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A curated list of awesome Java frameworks, libraries and software. A curated list of awesome Java frameworks, libraries and software.
- [Awesome Java](#awesome-java) - [Awesome Java](#awesome-java)
- [Build Tool](#build-tool) - [Ancients](#ancients)
- [Build](#build)
- [Bytecode Manipulation](#bytecode-manipulation) - [Bytecode Manipulation](#bytecode-manipulation)
- [Cluster Management](#cluster-management) - [Cluster Management](#cluster-management)
- [Code Analysis](#code-analysis) - [Code Analysis](#code-analysis)
@ -29,6 +30,7 @@ A curated list of awesome Java frameworks, libraries and software.
- [Imagery](#imagery) - [Imagery](#imagery)
- [JSON](#json) - [JSON](#json)
- [JVM and JDK](#jvm-and-jdk) - [JVM and JDK](#jvm-and-jdk)
- [Languages](#languages)
- [Logging](#logging) - [Logging](#logging)
- [Machine Learning](#machine-learning) - [Machine Learning](#machine-learning)
- [Messaging](#messaging) - [Messaging](#messaging)
@ -59,16 +61,30 @@ A curated list of awesome Java frameworks, libraries and software.
- [Websites](#websites) - [Websites](#websites)
- [Contributing](#contributing) - [Contributing](#contributing)
## Build Tool ## Ancients
*Tools which handle the buildcycle of an application.* *In existence since the beginning of time and wich will continue being used long after the hype has waned.*
* [Apache Maven](http://maven.apache.org/) - Declarative build and dependency management which favors convention over configuration. It's preferable to Apache Ant which uses a rather procedural approach and can be difficult to maintain. * [Apache Ant](http://ant.apache.org/) - Build process management with XML.
* [Gradle](http://www.gradle.org/) - Incremental builds which are programmed via Groovy instead of declaring XML. Works well with Maven's dependency management and treats Ant scripts as first-class citizens. * [cglib](https://github.com/cglib/cglib) - Bytecode generation library.
* [GlassFish](https://glassfish.java.net/) - Application server and reference implementation for Java EE sponsored by Oracle.
* [Hudson](http://hudson-ci.org/) - Continuous integration server still in active development.
* [JavaServer Faces](https://javaserverfaces.java.net/) - Oracle's open-source implementation of the JSF standard, Mojarra.
* [JavaServer Pages](https://jsp.java.net/) - Common templating for websites with custom tag libraries.
* [Liquibase](http://www.liquibase.org/) - Database-independent library for tracking, managing and applying database schema changes.
## Build
*Tools which handle the buildcycle and dependencies of an application.*
* [Apache Maven](http://maven.apache.org/) - Declarative build and dependency management which favors convention over configuration. It might be preferable to Apache Ant which uses a rather procedural approach and can be difficult to maintain.
* [Bazel](http://bazel.io) - Build tool from Google that builds code quickly and reliably.
* [Gradle](http://www.gradle.org/) - Incremental builds which are programmed via Groovy instead of declaring XML. Works well with Maven's dependency management.
## Bytecode Manipulation ## Bytecode Manipulation
*Libraries to manipulate Java bytecode programmatically.* *Libraries to manipulate bytecode programmatically.*
* [ASM](http://asm.ow2.org/) - All purpose, low level, bytecode manipulation and analysis. * [ASM](http://asm.ow2.org/) - All purpose, low level, bytecode manipulation and analysis.
* [Byte Buddy](http://bytebuddy.net/) - Further simplifies bytecode generation with a fluent API. * [Byte Buddy](http://bytebuddy.net/) - Further simplifies bytecode generation with a fluent API.
@ -85,10 +101,11 @@ A curated list of awesome Java frameworks, libraries and software.
*Tools that provide metrics and quality measurements.* *Tools that provide metrics and quality measurements.*
* [Checkstyle](http://checkstyle.sourceforge.net/) - Static analysis of coding conventions and standards. * [Checkstyle](https://github.com/checkstyle/checkstyle) - Static analysis of coding conventions and standards.
* [Error Prone](https://github.com/google/error-prone) - Catches common Java mistakes as compile-time errors. * [Error Prone](https://github.com/google/error-prone) - Catches common programming mistakes as compile-time errors.
* [FindBugs](http://findbugs.sourceforge.net/) - Static analysis of bytecode to find potential bugs. * [FindBugs](http://findbugs.sourceforge.net/) - Static analysis of bytecode to find potential bugs.
* [PMD](http://pmd.sourceforge.net/) - Source code analysis of bad coding practices. * [jQAssistant](http://jqassistant.org/) - Static code analysis with Neo4J-based query language.
* [PMD](https://github.com/pmd/pmd) - Source code analysis for finding bad coding practices.
* [SonarQube](http://www.sonarqube.org/) - Integrates other analysis components via plugins and provides an overview of the metrics over time. * [SonarQube](http://www.sonarqube.org/) - Integrates other analysis components via plugins and provides an overview of the metrics over time.
## Compiler-compiler ## Compiler-compiler
@ -103,137 +120,143 @@ A curated list of awesome Java frameworks, libraries and software.
*Libraries that provide external configuration.* *Libraries that provide external configuration.*
* [config](https://github.com/typesafehub/config) - Configuration library for JVM languages. * [config](https://github.com/typesafehub/config) - Configuration library for JVM languages.
* [owner](https://github.com/lviggiano/owner) - Reduces boilerplate of properties.
## Constraint Satisfaction Problem Solver ## Constraint Satisfaction Problem Solver
*Libraries that help on implementing optimization and satisfiability problems.* *Libraries that help on implementing optimization and satisfiability problems.*
* [Choco](http://choco-solver.org/) - An off-the-shelf constraint satisfaction problem solver, which uses constraint programming techniques to solve constraint satisfaction problems. * [Choco](http://choco-solver.org/) - Off-the-shelf constraint satisfaction problem solver, which uses constraint programming techniques.
* [JaCoP](https://github.com/radsz/jacop/) - A constraint programming solver that includes an interface for the [FlatZinc language](https://www.minizinc.org/downloads/doc-1.6/flatzinc-spec.pdf), enabling it to execute [MiniZinc](http://www.minizinc.org/) models. * [JaCoP](https://github.com/radsz/jacop/) - Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models.
* [OptaPlanner](http://www.optaplanner.org/) - A business planning and resource scheduling optimization solver. * [OptaPlanner](http://www.optaplanner.org/) - Business planning and resource scheduling optimization solver.
* [Sat4J](http://www.sat4j.org/) - A state-of-the-art SAT solver for boolean and optimization problems in Java. * [Sat4J](http://www.sat4j.org/) - State-of-the-art SAT solver for boolean and optimization problems.
## Continuous Integration ## Continuous Integration
*Tools which support continuously building, testing and releasing applications.* *Tools which support continuously building, testing and releasing applications.*
* [Bamboo](https://www.atlassian.com/software/bamboo) - Atlassian's solution with good integration of other products. You can either apply for an Open Source license or buy it. * [Bamboo](https://www.atlassian.com/software/bamboo) - Atlassian's solution with good integration of their other products. You can either apply for an open-source license or buy it.
* [CircleCI](https://circleci.com/) - Hosted service with a free trial. * [CircleCI](https://circleci.com/) - Hosted service with a free trial.
* [Codeship](https://www.codeship.io/features) - Hosted services with a limited free plan. * [Codeship](https://www.codeship.io/features) - Hosted services with a limited free plan.
* [Go](http://www.thoughtworks.com/products/go-continuous-delivery) - ThoughtWork's CI open source solution. * [fabric8](http://fabric8.io/) - Integration platform for containers.
* [Go](http://www.thoughtworks.com/products/go-continuous-delivery) - ThoughtWork's open-source solution.
* [Jenkins](http://jenkins-ci.org/) - Provides server-based deployment services. * [Jenkins](http://jenkins-ci.org/) - Provides server-based deployment services.
* [TeamCity](http://www.jetbrains.com/teamcity/) - JetBrain's CI solution with a free version. * [TeamCity](http://www.jetbrains.com/teamcity/) - JetBrain's CI solution with a free version.
* [Travis](https://travis-ci.org) - Hosted service often used for open source projects. * [Travis](https://travis-ci.org) - Hosted service often used for open-source projects.
## CSV ## CSV
*Frameworks and libraries that simplify reading/writing CSV data.* *Frameworks and libraries that simplify reading/writing CSV data.*
* [uniVocity-parsers](https://github.com/uniVocity/univocity-parsers) - One of the fastest and most feature-complete CSV parsers for Java. Also comes with parsers for TSV and fixed width records. * [uniVocity-parsers](https://github.com/uniVocity/univocity-parsers) - One of the fastest and most feature-complete CSV. Also comes with parsers for TSV and fixed width records.
## Database ## Database
*Everything which simplifies interactions with the database.* *Everything which simplifies interactions with the database.*
* [Apache Phoenix](http://phoenix.apache.org/) - High performance relational database layer over HBase for low latency applications. * [Apache Phoenix](http://phoenix.apache.org/) - High performance relational database layer over HBase for low latency applications.
* [Crate](https://crate.io/) - A distributed data store that implements data synchronization, sharding, scaling, and replication. In addition, it provides a SQL-based syntax to execute queries across a cluster. * [Crate](https://crate.io/) - Distributed data store that implements data synchronization, sharding, scaling, and replication. In addition, it provides a SQL-based syntax to execute queries across a cluster.
* [Flyway](http://flywaydb.org/) - Simple database migration with Java API. * [Flyway](http://flywaydb.org/) - Simple database migration tool.
* [H2](http://h2database.com/) - Small SQL Database notable for its in-memory functionality. * [H2](http://h2database.com/) - Small SQL Database notable for its in-memory functionality.
* [HikariCP](https://github.com/brettwooldridge/HikariCP) - High performance JDBC connection pool. * [HikariCP](https://github.com/brettwooldridge/HikariCP) - High performance JDBC connection pool.
* [JDBI](http://jdbi.org/) - Convenient abstraction of JDBC. * [JDBI](http://jdbi.org/) - Convenient abstraction of JDBC.
* [jOOQ](http://www.jooq.org/) - Generates typesafe code based on SQL schema. * [jOOQ](http://www.jooq.org/) - Generates typesafe code based on SQL schema.
* [Liquibase](http://www.liquibase.org/) - An open source database-independent library for tracking, managing and applying database schema changes. * [MapDB](http://www.mapdb.org/) - Embedded database engine that provides concurrent collections backed on disk or in off-heap memory.
* [MapDB](http://www.mapdb.org/) - An embedded database engine that provides concurrent Java collections backed on disk or in off-heap memory.
* [Presto](https://github.com/facebook/presto) - Distributed SQL query engine for big data. * [Presto](https://github.com/facebook/presto) - Distributed SQL query engine for big data.
* [Querydsl](http://www.querydsl.com/) - Typesafe unified queries for Java. * [Querydsl](http://www.querydsl.com/) - Typesafe unified queries.
## Data structures ## Data structures
* [Apache Parquet](https://parquet.incubator.apache.org/) - A columnar storage format based on assembly algorithms from the Dremel paper by Google. *Efficient and specific data structures.*
* [Protobuf](https://github.com/google/protobuf) - Protocol Buffers - Google's data interchange format.
* [Apache Parquet](https://parquet.incubator.apache.org/) - Columnar storage format based on assembly algorithms from the Dremel paper by Google.
* [Protobuf](https://github.com/google/protobuf) - Google's data interchange format.
* [SBE](https://github.com/real-logic/simple-binary-encoding) - Simple Binary Encoding, one of the fastest message formats around. * [SBE](https://github.com/real-logic/simple-binary-encoding) - Simple Binary Encoding, one of the fastest message formats around.
* [Wire](https://github.com/square/wire) - Clean, lightweight protocol buffers for Android and Java. * [Wire](https://github.com/square/wire) - Clean, lightweight protocol buffers.
## Date and Time ## Date and Time
*Libraries related to handling date and time.* *Libraries related to handling date and time.*
* [Joda-Time](http://www.joda.org/joda-time/) - De facto standard date/time-library before Java 8. * [Joda-Time](http://www.joda.org/joda-time/) - De facto standard date/time-library before Java 8.
* [Time4J](https://github.com/MenoData/Time4J) - Advanced date and time library for Java. * [Time4J](https://github.com/MenoData/Time4J) - Advanced date and time library.
## Dependency Injection ## Dependency Injection
*Libraries that help to realize the [Inversion of Control](http://en.wikipedia.org/wiki/Inversion_of_control) paradigm.* *Libraries that help to realize the [Inversion of Control](http://en.wikipedia.org/wiki/Inversion_of_control) paradigm.*
* [Apache DeltaSpike](https://deltaspike.apache.org/) - CDI extension framework.
* [Dagger2](http://google.github.io/dagger/) - Compile-time injection framework without reflection. * [Dagger2](http://google.github.io/dagger/) - Compile-time injection framework without reflection.
* [Guice](https://github.com/google/guice) - Lightweight but powerful framework that completes Dagger. * [Guice](https://github.com/google/guice) - Lightweight but powerful framework that completes Dagger.
* [HK2](https://hk2.java.net) - A light-weight and dynamic dependency injection framework. * [HK2](https://hk2.java.net) - Light-weight and dynamic dependency injection framework.
## Development ## Development
*Augmentation of the development process at a fundamental level.* *Augmentation of the development process at a fundamental level.*
* [ADT4J](https://github.com/sviperll/adt4j) - Algebraic Data Types for Java (JSR-269 code generator). * [ADT4J](https://github.com/sviperll/adt4j) - JSR-269 code generator for algebraic data types.
* [AspectJ](https://eclipse.org/aspectj/) - Seamless aspect-oriented programming extension. * [AspectJ](https://eclipse.org/aspectj/) - Seamless aspect-oriented programming extension.
* [Auto](https://github.com/google/auto) - Collection of source code generators. * [Auto](https://github.com/google/auto) - Collection of source code generators.
* [DCEVM](http://dcevm.github.io/) - Modification of the JVM that allows unlimited redefinition of loaded classes at runtime. * [DCEVM](http://dcevm.github.io/) - Modification of the JVM that allows unlimited redefinition of loaded classes at runtime.
* [Immutables](http://immutables.github.io/) - Scala-like case classes in standard Java. * [HotswapAgent](https://github.com/HotswapProjects/HotswapAgent) - Unlimited runtime class and resource redefinition.
* [JHipster](https://github.com/jhipster/generator-jhipster) - A [Yeoman](http://yeoman.io/) source code generator to create Java applications based on [Spring Boot](http://projects.spring.io/spring-boot/) and [AngularJS](https://angularjs.org/). * [Immutables](http://immutables.github.io/) - Scala-like case classes.
* [JHipster](https://github.com/jhipster/generator-jhipster) - Yeoman source code generator to create applications based on Spring Boot and AngularJS.
* [JRebel](http://zeroturnaround.com/software/jrebel/) - Commercial software that instantly reloads code and configuration changes without redeploys. * [JRebel](http://zeroturnaround.com/software/jrebel/) - Commercial software that instantly reloads code and configuration changes without redeploys.
* [Lombok](http://projectlombok.org/) - Code-generator which aims to reduce the verbosity of Java. * [Lombok](http://projectlombok.org/) - Code-generator which aims to reduce the verbosity.
* [Spring Loaded](https://github.com/spring-projects/spring-loaded) - Another class reloading agent for the JVM. * [Spring Loaded](https://github.com/spring-projects/spring-loaded) - Class reloading agent.
* [vert.x](http://vertx.io/) - Polyglot event-driven application framework for the JVM. * [vert.x](http://vertx.io/) - Polyglot event-driven application framework.
## Distributed Applications ## Distributed Applications
*Libraries and frameworks for writing distributed and fault-tolerant applications.* *Libraries and frameworks for writing distributed and fault-tolerant applications.*
* [Akka](http://akka.io) - Toolkit and runtime for building concurrent, distributed, and fault tolerant event-driven applications. * [Akka](http://akka.io) - Toolkit and runtime for building concurrent, distributed, and fault tolerant event-driven applications.
* [Apache Storm](http://storm.incubator.apache.org/) - Distributed realtime computation system. * [Apache Storm](http://storm.incubator.apache.org/) - Realtime computation system.
* [Apache ZooKeeper](http://zookeeper.apache.org/) - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems. * [Apache ZooKeeper](http://zookeeper.apache.org/) - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems.
* [Hazelcast](http://hazelcast.org/) - Distributed and highly scalable in-memory datagrid. * [Hazelcast](http://hazelcast.org/) - Highly scalable in-memory datagrid.
* [Hystrix](https://github.com/Netflix/Hystrix) - Latency and Fault Tolerance for Distributed Systems. * [Hystrix](https://github.com/Netflix/Hystrix) - Provides latency and fault tolerance.
* [JGroups](http://www.jgroups.org/) - Toolkit for reliable messaging and creating clusters whose nodes can send messages to each other. * [JGroups](http://www.jgroups.org/) - Toolkit for reliable messaging and creating clusters.
* [Orbit](http://orbit.bioware.com/) - Virtual Actors, adding another level of abstraction to traditional Actors. * [Orbit](http://orbit.bioware.com/) - Virtual Actors, adding another level of abstraction to traditional actors.
* [Quasar](http://www.paralleluniverse.co/quasar/) - Lightweight threads and actors for the JVM. * [Quasar](http://www.paralleluniverse.co/quasar/) - Lightweight threads and actors for the JVM.
## Distributed Databases ## Distributed Databases
*Databases in a distributed system that appear to applications as a single data source.* *Databases in a distributed system that appear to applications as a single data source.*
* [Apache Cassandra](http://cassandra.apache.org) - Apache Cassandra is a distributed column-oriented database providing high availability with no single point of failure. * [Apache Cassandra](http://cassandra.apache.org) - Column-oriented and providing high availability with no single point of failure.
* [Apache HBase](http://hbase.apache.org) - Apache HBase is the Hadoop database, a distributed, scalable, big data store. * [Apache HBase](http://hbase.apache.org) - Hadoop database for big data.
* [Infinispan](http://infinispan.org/) - Distributed and highly concurrent key/value datastore used for caching. * [Druid](http://druid.io) - Real-time and historical OLAP data store that excel at aggregation and approximation queries.
* [Infinispan](http://infinispan.org/) - Highly concurrent key/value datastore used for caching.
## Distribution ## Distribution
*Tools which handle the distribution of Java applications in native formats.* *Tools which handle the distribution of applications in native formats.*
* [Bintray](https://bintray.com/) - Version control for binaries which handles the publishing. Can also be used with Maven or Gradle and has a free plan for Open Source Software or several business plans. * [Bintray](https://bintray.com/) - Version control for binaries which handles the publishing. Can also be used with Maven or Gradle and has a free plan for open-source software or several business plans.
* [Central Repository](http://search.maven.org/) - Largest binary component repository available as [a free service to the open source community](http://central.sonatype.org). Default used by Apache Maven and available in all other build tools. * [Central Repository](http://search.maven.org/) - Largest binary component repository available as a free service to the open-source community. Default used by Apache Maven and available in all other build tools.
* [IzPack](http://izpack.org/) - Setup authoring tool for cross-platform deployments. * [IzPack](http://izpack.org/) - Setup authoring tool for cross-platform deployments.
* [JitPack](https://jitpack.io/) - Easy to use package repository for GitHub. Builds Maven/Gradle projects on demand and publishes ready-to-use packages. * [JitPack](https://jitpack.io/) - Easy to use package repository for GitHub. Builds Maven/Gradle projects on demand and publishes ready-to-use packages.
* [Launch4j](http://launch4j.sourceforge.net/) - Wraps JARs in lightweight and native Windows executables. * [Launch4j](http://launch4j.sourceforge.net/) - Wraps JARs in lightweight and native Windows executables.
* [Nexus](http://www.sonatype.com/nexus) - Binary management with proxy and caching capabilities. * [Nexus](http://www.sonatype.com/nexus) - Binary management with proxy and caching capabilities.
* [packr](https://github.com/libgdx/packr/) - Packs your JAR, assets and JVM for native distribution on Windows, Linux and Mac OS X. * [packr](https://github.com/libgdx/packr/) - Packs JARs, assets and the JVM for native distribution on Windows, Linux and Mac OS X.
## Document Processing ## Document Processing
*Libraries that assist with processing office document formats.* *Libraries that assist with processing office document formats.*
* [Apache POI](http://poi.apache.org/) - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT). * [Apache POI](http://poi.apache.org/) - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT).
* [documents4j](http://documents4j.com) - Java API for document format conversion using third-party converters such as MS Word. * [documents4j](http://documents4j.com) - API for document format conversion using third-party converters such as MS Word.
* [jOpenDocument](http://www.jopendocument.org/) - Processes the OpenDocument format. * [jOpenDocument](http://www.jopendocument.org/) - Processes the OpenDocument format.
## Functional Programming ## Functional Programming
*Libraries that facilitate functional programming in Java.* *Libraries that facilitate functional programming.*
* [Cyclops](https://github.com/aol/cyclops) - Monad and stream utils, comprehensions, pattern matching, trampolines, etc for Java 8. * [Cyclops](https://github.com/aol/cyclops) - Monad and stream utilities, comprehensions, pattern matching, trampolines and much more.
* [Fugue](https://bitbucket.org/atlassian/fugue) - Functional extensions to Guava and Java 8. * [Fugue](https://bitbucket.org/atlassian/fugue) - Functional extensions to Guava.
* [Functional Java](http://www.functionaljava.org) - Implements numerous basic and advanced programming abstractions that assist composition oriented development. * [Functional Java](http://www.functionaljava.org) - Implements numerous basic and advanced programming abstractions that assist composition-oriented development.
* [Javaslang](http://javaslang.com) - Functional component library built for Java 8+ that provides persistent data types and functional control structures. * [Javaslang](http://javaslang.com) - Functional component library that provides persistent data types and functional control structures.
* [jOOλ](https://github.com/jOOQ/jOOL) - An extension to Java 8 which aims to fix gaps in lambda, providing numerous missing types and a rich set of sequential Stream API additions. * [jOOλ](https://github.com/jOOQ/jOOL) - Extension to Java 8 which aims to fix gaps in lambda, providing numerous missing types and a rich set of sequential Stream API additions.
## Game Development ## Game Development
@ -254,12 +277,13 @@ A curated list of awesome Java frameworks, libraries and software.
*Everything about high performance computation, from collections to specific libraries.* *Everything about high performance computation, from collections to specific libraries.*
* [Agrona](https://github.com/real-logic/Agrona) - Data structures and utility methods that are common in high-performance applications.
* [Disruptor](http://lmax-exchange.github.io/disruptor/) - Inter-thread messaging library. * [Disruptor](http://lmax-exchange.github.io/disruptor/) - Inter-thread messaging library.
* [fastutil](http://fastutil.di.unimi.it/) - Fast and compact type-specific collections for Java. * [fastutil](http://fastutil.di.unimi.it/) - Fast and compact type-specific collections.
* [GS Collections](https://github.com/goldmansachs/gs-collections) - Collection framework inspired by Smalltalk. * [GS Collections](https://github.com/goldmansachs/gs-collections) - Collection framework inspired by Smalltalk.
* [HPPC](http://labs.carrotsearch.com/hppc.html) - Primitive collections. * [HPPC](http://labs.carrotsearch.com/hppc.html) - Primitive collections.
* [Javolution](http://javolution.org/) - Library for real-time and embedded systems. * [Javolution](http://javolution.org/) - Library for real-time and embedded systems.
* [JCTools](https://github.com/JCTools/JCTools) - Java Concurrency Tools currently missing from the JDK. * [JCTools](https://github.com/JCTools/JCTools) - Concurrency tools currently missing from the JDK.
* [Koloboke](https://github.com/OpenHFT/Koloboke) - Hash sets and hash maps. * [Koloboke](https://github.com/OpenHFT/Koloboke) - Hash sets and hash maps.
* [Trove](http://trove.starlight-systems.com/) - Primitive collections. * [Trove](http://trove.starlight-systems.com/) - Primitive collections.
@ -269,23 +293,23 @@ A curated list of awesome Java frameworks, libraries and software.
* [Eclipse](http://www.eclipse.org/) - Established, open-souce project with support for lots of plugins and languages. * [Eclipse](http://www.eclipse.org/) - Established, open-souce project with support for lots of plugins and languages.
* [IntelliJ IDEA](http://www.jetbrains.com/idea/) - Supports a lot of JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector. * [IntelliJ IDEA](http://www.jetbrains.com/idea/) - Supports a lot of JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector.
* [NetBeans](https://netbeans.org/) - Provides integration for several Java SE and EE features starting with database access and servers to HTML5 and AngularJS. * [NetBeans](https://netbeans.org/) - Provides integration for several Java SE and EE features from database access to HTML5.
## Imagery ## Imagery
*Libraries that assist with the creation, evaluation or manipulation of graphical images.* *Libraries that assist with the creation, evaluation or manipulation of graphical images.*
* [Imgscalr](https://github.com/thebuzzmedia/imgscalr) - Imgscalr is an very simple and efficient (hardware accelerated) image-scaling library implemented in pure Java 2D. * [Imgscalr](https://github.com/thebuzzmedia/imgscalr) - Simple and efficient hardware-accelerated image-scaling library implemented in pure Java 2D.
* [Picasso](http://square.github.io/picasso/) - Image downloading and caching library for Android. * [Picasso](http://square.github.io/picasso/) - Image downloading and caching library for Android.
* [Thumbnailator](https://code.google.com/p/thumbnailator) - Thumbnailator is a high-quality thumbnail generation library for Java. * [Thumbnailator](https://github.com/coobird/thumbnailator) - Thumbnailator is a high-quality thumbnail generation library for Java.
* [ZXing](https://github.com/zxing/zxing) - Multi-format 1D/2D barcode image processing library. * [ZXing](https://github.com/zxing/zxing) - Multi-format 1D/2D barcode image processing library.
## JSON ## JSON
*Libraries that simplify JSON processing.* *Libraries that simplify JSON processing.*
* [Genson](http://owlike.github.io/genson) - Powerful and easy to use Java and Scala to JSON conversion library. * [Genson](http://owlike.github.io/genson) - Powerful and easy to use Java to JSON conversion library.
* [Gson](https://github.com/google/gson) - Serializes Java objects to JSON and vice versa. Good performance with on-the-fly usage. * [Gson](https://github.com/google/gson) - Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.
* [Jackson](http://wiki.fasterxml.com/JacksonHome) - Similar to GSON but has performance gains if you need to instantiate the library more often. * [Jackson](http://wiki.fasterxml.com/JacksonHome) - Similar to GSON but has performance gains if you need to instantiate the library more often.
* [LoganSquare](https://github.com/bluelinelabs/LoganSquare) - JSON parsing and serializing library based on Jackson's streaming API. Outpeforms GSON & Jackson's library. * [LoganSquare](https://github.com/bluelinelabs/LoganSquare) - JSON parsing and serializing library based on Jackson's streaming API. Outpeforms GSON & Jackson's library.
@ -294,61 +318,75 @@ A curated list of awesome Java frameworks, libraries and software.
*Current implementations of the JVM/JDK.* *Current implementations of the JVM/JDK.*
* [JDK 9](https://jdk9.java.net/) - Early access releases of JDK 9. * [JDK 9](https://jdk9.java.net/) - Early access releases of JDK 9.
* [OpenJDK](http://openjdk.java.net/) - Open source implementation. * [OpenJDK](http://openjdk.java.net/) - Open-source implementation.
## Languages
*Languages other than Java that can be used to write JVM applications.*
* [Scala](http://www.scala-lang.org/) - Statically typed programming language that fuses the object - oriented model and functional programming ideas.
* [Groovy](http://www.groovy-lang.org/) - Optionally typed and dynamic language, with static-typing and static compilation capabilities. Currently an incubating Apache project
* [Clojure](http://clojure.org/) - Dynamically typed programming language that can be seen as a modern take on Lisp.
* [Ceylon](http://ceylon-lang.org/) - Statically typed object-oriented language developed by RedHat.
* [Kotlin](http://kotlinlang.org/) - JetBrain's statically typed programming language for the JVM, Android and the browser.
## Logging ## Logging
*Libraries that log the behavior of an application.* *Libraries that log the behavior of an application.*
* [Apache Log4j 2](http://logging.apache.org/log4j/) - Complete rewrite of the previous version. Now has a powerful plugin and configuration architecture. * [Apache Log4j 2](http://logging.apache.org/log4j/) - Complete rewrite with a powerful plugin and configuration architecture.
* [kibana](http://www.elasticsearch.org/overview/kibana/) - Analyzes and visualizes log files. * [kibana](http://www.elasticsearch.org/overview/kibana/) - Analyzes and visualizes log files.
* [Logback](http://logback.qos.ch/) - Founded by the same developer as Log4j and proves to be a robust logging library with interesting configuration options via Groovy. * [Logback](http://logback.qos.ch/) - Robust logging library with interesting configuration options via Groovy.
* [logstash](http://logstash.net/) - Tool for managing log files. * [logstash](http://logstash.net/) - Tool for managing log files.
* [Metrics](http://metrics.codahale.com/) - Expose metrics via JMX or HTTP and can send them to a database.
* [SLF4J](http://www.slf4j.org/) - Abstraction layer which is to be used with an implementation. * [SLF4J](http://www.slf4j.org/) - Abstraction layer which is to be used with an implementation.
## Machine Learning ## Machine Learning
*Tools that provide specific statistical algorithms which allow to learn from data.* *Tools that provide specific statistical algorithms which allow learning from data.*
* [Apache Flink](https://flink.apache.org/) - Fast and reliable large-scale data processing engine. * [Apache Flink](https://flink.apache.org/) - Fast and reliable large-scale data processing engine.
* [Apache Hadoop](http://hadoop.apache.org/) - Open-source software framework for storage and large-scale processing of data-sets on clusters of commodity hardware. * [Apache Hadoop](http://hadoop.apache.org/) - Storage and large-scale processing of data-sets on clusters of commodity hardware.
* [Apache Mahout](https://mahout.apache.org/) - Scalable algorithms focused on collaborative filtering, clustering and classification. * [Apache Mahout](https://mahout.apache.org/) - Scalable algorithms focused on collaborative filtering, clustering and classification.
* [Apache Spark](http://spark.apache.org/) - Open-source data analytics cluster computing framework. * [Apache Spark](http://spark.apache.org/) - Data analytics cluster computing framework.
* [DeepDive](http://deepdive.stanford.edu) - Creates structured information from unstructured data and integrates it into an existing database.
* [Deeplearning4j](http://deeplearning4j.org/) - Distributed and multi-threaded deep learning library.
* [H2O](http://0xdata.com/) - Analytics engine for statistics over big data. * [H2O](http://0xdata.com/) - Analytics engine for statistics over big data.
* [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Collection of algorithms for data mining tasks ranging from pre-processing to visualization. * [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Collection of algorithms for data mining tasks ranging from pre-processing to visualization.
## Messaging ## Messaging
*Tools that help on sending messages between clients to ensure protocol independency.* *Tools that help to send messages between clients in order to ensure protocol independency.*
* [Aeron](https://github.com/real-logic/Aeron) - Efficient reliable unicast and multicast message transport. * [Aeron](https://github.com/real-logic/Aeron) - Efficient reliable unicast and multicast message transport.
* [Apache ActiveMQ](http://activemq.apache.org/) - Open-source message broker that implements JMS and converts synchronous to asynchronous communication. * [Apache ActiveMQ](http://activemq.apache.org/) - Message broker that implements JMS and converts synchronous to asynchronous communication.
* [Apache Camel](http://camel.apache.org/) - Glues together different transport APIs via Enterprise Integration Patterns. * [Apache Camel](http://camel.apache.org/) - Glues together different transport APIs via Enterprise Integration Patterns.
* [Apache Kafka](http://kafka.apache.org/) - High-throughput distributed messaging system. * [Apache Kafka](http://kafka.apache.org/) - High-throughput distributed messaging system.
* [Hermes](http://hermes.allegro.tech) - Fast and reliable message broker built on top of Kafka.
* [JBoss HornetQ](http://hornetq.jboss.org/) - Clear, concise, modular and made to be embedded. * [JBoss HornetQ](http://hornetq.jboss.org/) - Clear, concise, modular and made to be embedded.
* [JeroMQ](https://github.com/zeromq/jeromq) - Pure Java implementation of ZeroMQ. * [JeroMQ](https://github.com/zeromq/jeromq) - Implementation of ZeroMQ.
* [Smack](https://github.com/igniterealtime/Smack/) - A cross-platform [XMPP](http://en.wikipedia.org/wiki/XMPP) client library for Java and Android. * [Smack](https://github.com/igniterealtime/Smack/) - Cross-platform XMPP client library.
## Miscellaneous ## Miscellaneous
*Everything else.* *Everything else.*
* [Design Patterns](https://github.com/iluwatar/java-design-patterns) - Implementation and explanation of the most common design patterns. * [Design Patterns](https://github.com/iluwatar/java-design-patterns) - Implementation and explanation of the most common design patterns.
* [fabric8](http://fabric8.io/) - Integration platform for Java containers.
* [Jimfs](https://github.com/google/jimfs) - In-memory file system. * [Jimfs](https://github.com/google/jimfs) - In-memory file system.
* [Lanterna](https://code.google.com/p/lanterna/) - Easy console text GUI library similar to curses. * [Lanterna](https://code.google.com/p/lanterna/) - Easy console text GUI library similar to curses.
* [LightAdmin](http://lightadmin.org/) - Pluggable CRUD UI library for rapid application development. * [LightAdmin](http://lightadmin.org/) - Pluggable CRUD UI library for rapid application development.
* [Metrics](http://metrics.codahale.com/) - Create your own metrics or add them for supported frameworks, then expose them via JMX or HTTP, or send them to a database.
* [OpenRefine](http://openrefine.org/) - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases. * [OpenRefine](http://openrefine.org/) - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases.
* [RoboVM](http://www.robovm.org/) - Commercial framework with a free trial to write native iOS apps in Java. * [RoboVM](http://www.robovm.org/) - Commercial framework with a free trial to write native iOS apps.
## Monitoring ## Monitoring
*Tools that monitor applications in production.* *Tools that monitor applications in production.*
* [AppDynamics](http://www.appdynamics.com/) - Commercial performance monitor. * [AppDynamics](http://www.appdynamics.com/) - Commercial performance monitor.
* [JavaMelody](https://github.com/javamelody/javamelody) - Open-source performance monitoring and profiling. * [JavaMelody](https://github.com/javamelody/javamelody) - Performance monitoring and profiling.
* [Kamon](http://www.kamon.io/) - Tool for monitoring applications running on the JVM.
* [New Relic](http://newrelic.com/) - Commercial performance monitor. * [New Relic](http://newrelic.com/) - Commercial performance monitor.
* [SPM](http://sematext.com/spm/) - Commercial performance monitor with distributing transaction tracing for JVM apps.
* [Takipi](https://www.takipi.com/) - Commercial in-production error monitoring and debugging. * [Takipi](https://www.takipi.com/) - Commercial in-production error monitoring and debugging.
## Native ## Native
@ -371,19 +409,19 @@ A curated list of awesome Java frameworks, libraries and software.
* [Async Http Client](https://github.com/AsyncHttpClient/async-http-client) - Asynchronous HTTP and WebSocket client library. * [Async Http Client](https://github.com/AsyncHttpClient/async-http-client) - Asynchronous HTTP and WebSocket client library.
* [Grizzly](https://grizzly.java.net/) - NIO framework. Used as a network layer in Glassfish. * [Grizzly](https://grizzly.java.net/) - NIO framework. Used as a network layer in Glassfish.
* [Netty](http://netty.io/) - A framework for building high performance network applications. * [Netty](http://netty.io/) - Framework for building high performance network applications.
* [OkHttp](http://square.github.io/okhttp/) - An HTTP+SPDY client for Android and Java applications. * [OkHttp](http://square.github.io/okhttp/) - HTTP+SPDY client.
* [Undertow](http://undertow.io/) - Web server providing both blocking and non-blocking API’s based on NIO. Used as a network layer in WildFly. * [Undertow](http://undertow.io/) - Web server providing both blocking and non-blocking API’s based on NIO. Used as a network layer in WildFly.
## ORM ## ORM
*APIs which handle the persistence of objects.* *APIs which handle the persistence of objects.*
* [Ebean](http://ebean-orm.github.io/) - ORM Framework that provides fast data access and even faster coding. * [Ebean](http://ebean-orm.github.io/) - Provides simple and fast data access.
* [EclipseLink](https://www.eclipse.org/eclipselink/) - Supports a number of persistence standards: JPA, JAXB, JCA and SDO. * [EclipseLink](https://www.eclipse.org/eclipselink/) - Supports a number of persistence standards: JPA, JAXB, JCA and SDO.
* [Hibernate](http://hibernate.org/orm/) - Robust and widely used with an active community. * [Hibernate](http://hibernate.org/orm/) - Robust and widely used with an active community.
* [MyBatis](http://mybatis.github.io/mybatis-3/) - Persistence framework that couples objects with stored procedures or SQL statements. * [MyBatis](http://mybatis.github.io/mybatis-3/) - Couples objects with stored procedures or SQL statements.
* [OrmLite](http://ormlite.com/) - Lightweight ORM package avoiding the complexity and overhead of other ORM products. * [OrmLite](http://ormlite.com/) - Lightweight package avoiding the complexity and overhead of other ORM products.
## PDF ## PDF
@ -392,17 +430,20 @@ A curated list of awesome Java frameworks, libraries and software.
* [Apache FOP](http://xmlgraphics.apache.org/fop/) - Creates PDF from XSL-FO. * [Apache FOP](http://xmlgraphics.apache.org/fop/) - Creates PDF from XSL-FO.
* [Apache PDFBox](http://pdfbox.apache.org/) - Toolbox for creating and manipulating PDF. * [Apache PDFBox](http://pdfbox.apache.org/) - Toolbox for creating and manipulating PDF.
* [DynamicReports](http://dynamicreports.org/) - Simplifies JasperReports. * [DynamicReports](http://dynamicreports.org/) - Simplifies JasperReports.
* [flyingsaucer](https://github.com/flyingsaucerproject/flyingsaucer) - XML/XHTML and CSS 2.1 renderer in pure Java. * [flyingsaucer](https://github.com/flyingsaucerproject/flyingsaucer) - XML/XHTML and CSS 2.1 renderer.
* [iText](http://itextpdf.com/) - Easy to use PDF library which creates PDF files programmatically but requires a license for commercial purposes. * [iText](http://itextpdf.com/) - Creates PDF files programmatically but requires a license for commercial purposes.
* [JasperReports](http://community.jaspersoft.com/project/jasperreports-library) - Complex reporting engine. * [JasperReports](http://community.jaspersoft.com/project/jasperreports-library) - Complex reporting engine.
## Performance analysis ## Performance analysis
*Tools for performance optimization and dynamic program analysis.* *Tools for performance analysis, profiling and benchmarking.*
* [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html) - Commercial Java profiler. * [jHiccup](http://github.com/giltene/jHiccup) - Logs and records platform JVM stalls.
* [JMH](http://openjdk.java.net/projects/code-tools/jmh/) - Microbenchmarking tool for the JVM.
* [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html) - Commercial profiler.
* [LatencyUtils](https://github.com/LatencyUtils/LatencyUtils) - Utilities for latency measurement and reporting.
* [VisualVM](http://visualvm.java.net/) - Visual interface for detailed information about running applications. * [VisualVM](http://visualvm.java.net/) - Visual interface for detailed information about running applications.
* [YourKit Java Profiler](https://www.yourkit.com/features/) - Commercial Java profiler. * [YourKit Java Profiler](https://www.yourkit.com/features/) - Commercial profiler.
## Reactive libraries ## Reactive libraries
@ -416,27 +457,29 @@ A curated list of awesome Java frameworks, libraries and software.
*Frameworks specifically for creating RESTful services.* *Frameworks specifically for creating RESTful services.*
* [Dropwizard](https://dropwizard.github.io/dropwizard/) - Opinionated framework for setting up modern web applications, includes Jetty, Jackson, Jersey and Metrics. * [Dropwizard](https://dropwizard.github.io/dropwizard/) - Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics.
* [Feign](https://github.com/Netflix/feign) - Java to HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket. * [Feign](https://github.com/Netflix/feign) - HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.
* [Jersey](https://jersey.java.net/) - JAX-RS reference implementation. * [Jersey](https://jersey.java.net/) - JAX-RS reference implementation.
* [RESTEasy](http://resteasy.jboss.org/) - Fully certified and portable implementation of the JAX-RS specification. * [RESTEasy](http://resteasy.jboss.org/) - Fully certified and portable implementation of the JAX-RS specification.
* [RestExpress](https://github.com/RestExpress/RestExpress) - RestExpress is a thin wrapper on the JBOSS Netty HTTP stack to provide a simple and easy way to create RESTful services in Java that support massive Internet Scale and performance. * [RestExpress](https://github.com/RestExpress/RestExpress) - Thin wrapper on the JBOSS Netty HTTP stack to provide scaling and performance.
* [RestX](http://restx.io) - Opinionated framework based one annotation processor, providing support for REST endpoint, type safe DI, hot compile/reload, API doc, metrics, specs-oriented endpoint testing. * [RestX](http://restx.io) - Framework based on annotation processing and compile-time source generation.
* [Retrofit](http://square.github.io/retrofit/) - A type-safe REST client for Java. * [Retrofit](http://square.github.io/retrofit/) - Type-safe REST client.
* [Spark](http://www.sparkjava.com/) - A Sinatra inspired framework for java. * [Spark](http://www.sparkjava.com/) - Sinatra inspired framework.
* [Swagger](https://helloreverb.com/developers/swagger) - Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services. * [Swagger](https://helloreverb.com/developers/swagger) - Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services.
## Science ## Science
*Libraries for scientific computing and analysis.* *Libraries for scientific computing and analysis.*
* [SCaVis](http://jwork.org/scavis/) - Environment for scientific computation, data analysis and data visualization. * [DataMelt](http://jwork.org/dmelt/) - Environment for scientific computation, data analysis and data visualization.
* [JGraphT](https://github.com/jgrapht/jgrapht) - Graph library that provides mathematical graph-theory objects and algorithms.
* [JScience](http://jscience.org/) - Provides a set of classes to work with scientific measurements and units.
## Search ## Search
*Engines which index documents for search and analysis.* *Engines which index documents for search and analysis.*
* [Apache Solr](http://lucene.apache.org/solr/) - Full enterprise search engine optimized for high volume traffic. * [Apache Solr](http://lucene.apache.org/solr/) - Enterprise search engine optimized for high volume traffic.
* [Elasticsearch](http://www.elasticsearch.org/) - Distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. * [Elasticsearch](http://www.elasticsearch.org/) - Distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents.
## Security ## Security
@ -446,9 +489,8 @@ A curated list of awesome Java frameworks, libraries and software.
* [Apache Shiro](http://shiro.apache.org/) - Performs authentication, authorization, cryptography and session management. * [Apache Shiro](http://shiro.apache.org/) - Performs authentication, authorization, cryptography and session management.
* [Bouncy Castle](https://www.bouncycastle.org/java.html) - All-purpose cryptographic library. JCA provider, wide range of functions from basic helpers to PGP/SMIME operations. * [Bouncy Castle](https://www.bouncycastle.org/java.html) - All-purpose cryptographic library. JCA provider, wide range of functions from basic helpers to PGP/SMIME operations.
* [Cryptomator](http://cryptomator.org/) - Multiplatform transparent client-side encryption of files in the cloud. * [Cryptomator](http://cryptomator.org/) - Multiplatform transparent client-side encryption of files in the cloud.
* [Keycloak](http://keycloak.jboss.org/) - Integrated SSO and IDM for browser apps and RESTful web services. Currently in beta but looks very promising. * [Keycloak](http://keycloak.jboss.org/) - Integrated SSO and IDM for browser apps and RESTful web services.
* [PicketLink](http://picketlink.org/) - PicketLink is an umbrella project for security and identity management for Java applications. * [PicketLink](http://picketlink.org/) - Umbrella project for security and identity management.
* [Spring Security](http://projects.spring.io/spring-security/) - Focuses on authentication/authorization and protects against several attack vectors.
## Serialization ## Serialization
@ -456,6 +498,7 @@ A curated list of awesome Java frameworks, libraries and software.
* [FlatBuffers](https://github.com/google/flatbuffers) - Memory efficient serialization library that can access serialized data without unpacking and parsing it. * [FlatBuffers](https://github.com/google/flatbuffers) - Memory efficient serialization library that can access serialized data without unpacking and parsing it.
* [Kryo](https://github.com/EsotericSoftware/kryo) - Fast and efficient object graph serialization framework. * [Kryo](https://github.com/EsotericSoftware/kryo) - Fast and efficient object graph serialization framework.
* [FST](https://github.com/RuedigerMoeller/fast-serialization) - JDK compatible high performance object graph serialization.
* [MessagePack](https://github.com/msgpack/msgpack-java) - Efficient binary serialization format. * [MessagePack](https://github.com/msgpack/msgpack-java) - Efficient binary serialization format.
## Server ## Server
@ -464,7 +507,6 @@ A curated list of awesome Java frameworks, libraries and software.
* [Apache Tomcat](http://tomcat.apache.org/) - Robust all-round server for Servlet and JSP. * [Apache Tomcat](http://tomcat.apache.org/) - Robust all-round server for Servlet and JSP.
* [Apache TomEE](http://tomee.apache.org/) - Tomcat plus Java EE. * [Apache TomEE](http://tomee.apache.org/) - Tomcat plus Java EE.
* [GlassFish](https://glassfish.java.net/) - Open source reference implementation for Java EE sponsored by Oracle.
* [Jetty](http://www.eclipse.org/jetty/) - Lightweight, small server, often embedded in projects. * [Jetty](http://www.eclipse.org/jetty/) - Lightweight, small server, often embedded in projects.
* [WebSphere Liberty](https://developer.ibm.com/wasdev/) - Lightweight, modular server developed by IBM * [WebSphere Liberty](https://developer.ibm.com/wasdev/) - Lightweight, modular server developed by IBM
* [WildFly](http://www.wildfly.org/) - Formerly known as JBoss and developed by Red Hat with extensive Java EE support. * [WildFly](http://www.wildfly.org/) - Formerly known as JBoss and developed by Red Hat with extensive Java EE support.
@ -475,36 +517,33 @@ A curated list of awesome Java frameworks, libraries and software.
* [Apache Velocity](http://velocity.apache.org/) - Templates for HTML pages, emails or source code generation in general. * [Apache Velocity](http://velocity.apache.org/) - Templates for HTML pages, emails or source code generation in general.
* [FreeMarker](http://freemarker.org/) - General templating engine without any heavyweight or opinionated dependencies. * [FreeMarker](http://freemarker.org/) - General templating engine without any heavyweight or opinionated dependencies.
* [Handlebars.java](http://jknack.github.io/handlebars.java/) - Logic-less and semantic Mustache templates with Java. * [Handlebars.java](http://jknack.github.io/handlebars.java/) - Logic-less and semantic Mustache templates.
* [JavaServer Pages](https://jsp.java.net/) - Common templating for websites with custom tag libraries.
* [Thymeleaf](http://www.thymeleaf.org/) - Aims to be a substitute for JSP and works for XML files in general. * [Thymeleaf](http://www.thymeleaf.org/) - Aims to be a substitute for JSP and works for XML files in general.
## Testing ## Testing
*Tools that test from object to interface level including performance and other benchmarks.* *Tools that test from model to the view.*
* [Apache JMeter](http://jmeter.apache.org/) - Functional testing and performance measurements. * [Apache JMeter](http://jmeter.apache.org/) - Functional testing and performance measurements.
* [Arquillian](http://arquillian.org/) - Integration and functional testing platform with integration of Java EE containers. * [Arquillian](http://arquillian.org/) - Integration and functional testing platform for Java EE containers.
* [AssertJ](http://joel-costigliola.github.io/assertj/) - Fluent assertions that improve readability. * [AssertJ](http://joel-costigliola.github.io/assertj/) - Fluent assertions that improve readability.
* [Awaitility](https://github.com/jayway/awaitility) - DSL for synchronizing asynchronous operations. * [Awaitility](https://github.com/jayway/awaitility) - DSL for synchronizing asynchronous operations.
* [Citrus](http://citrusframework.org/) - Integration testing framework with focus on client- and serverside messaging. * [Citrus](http://citrusframework.org/) - Integration testing framework with focus on client- and serverside messaging.
* [Cucumber](https://github.com/cucumber/cucumber-jvm) - A BDD testing framework that supports the most popular programming languages for the JVM. * [Cucumber](https://github.com/cucumber/cucumber-jvm) - BDD testing framework.
* [Gatling](http://gatling.io/) - Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance. * [Gatling](http://gatling.io/) - Load testing tool designed for ease of use, maintainability and high performance.
* [Hamcrest](http://hamcrest.org/JavaHamcrest/) - Matchers that can be combined to create flexible expressions of intent. * [Hamcrest](http://hamcrest.org/JavaHamcrest/) - Matchers that can be combined to create flexible expressions of intent.
* [jHiccup](http://github.com/giltene/jHiccup) - logs and records platform JVM stalls. * [JMockit](http://jmockit.org/) - Mocks static, final methods and more.
* [JMH](http://openjdk.java.net/projects/code-tools/jmh/) - Microbenchmarking tool for the JVM.
* [JMockit](http://jmockit.org/) - The Mock Anything Toolkit for Java, mocks static, final methods and more.
* [JUnit](http://junit.org/) - Common testing framework. * [JUnit](http://junit.org/) - Common testing framework.
* [LatencyUtils](https://github.com/LatencyUtils/LatencyUtils) - Utilities for latency measurement and reporting.
* [Mockito](https://github.com/mockito/mockito) - Creation of test double objects in automated unit tests for the purpose of TDD or BDD. * [Mockito](https://github.com/mockito/mockito) - Creation of test double objects in automated unit tests for the purpose of TDD or BDD.
* [PowerMock](https://github.com/jayway/powermock) - Allows you to unit test code normally regarded as untestable. * [PowerMock](https://github.com/jayway/powermock) - Enables mocking of static methods, constructors, final classes and methods, private methods and removal of static initializers.
* [REST Assured](https://github.com/jayway/rest-assured) - Java DSL for easy testing for REST/HTTP services.
* [Selenide](http://selenide.org/) - Concise API around Selenium to write stable and readable UI tests. * [Selenide](http://selenide.org/) - Concise API around Selenium to write stable and readable UI tests.
* [Selenium](http://docs.seleniumhq.org/) - Portable software testing framework for web applications. * [Selenium](http://docs.seleniumhq.org/) - Portable software testing framework for web applications.
* [Spock](http://docs.spockframework.org/) - Testing framework featuring an expressive Groovy-derived specification language. Compatible with JUnit runners so easy to use with standard build tools and IDEs. * [Spock](http://docs.spockframework.org/) - JUnit-compatible framework featuring an expressive Groovy-derived specification language.
* [TestNG](http://testng.org/) - Testing framework. * [TestNG](http://testng.org/) - Testing framework.
* [Truth](https://github.com/google/truth) - Assertion/Proposition framework for Java unit tests by Google. * [Truth](https://github.com/google/truth) - Google's assertion and proposition framework.
* [Unitils](http://www.unitils.org/) - Testing library divided into modules for unit and integration testing. * [Unitils](http://www.unitils.org/) - Modular testing library for unit and integration testing.
* [WireMock](http://wiremock.org/) - Testing library for stubbing and mocking web services. * [WireMock](http://wiremock.org/) - Stubbs and mocks web services.
## Utility ## Utility
@ -512,38 +551,37 @@ A curated list of awesome Java frameworks, libraries and software.
* [Apache Commons](http://commons.apache.org/) - Provides different general purpose functions like configuration, validation, collections, file upload or XML processing. * [Apache Commons](http://commons.apache.org/) - Provides different general purpose functions like configuration, validation, collections, file upload or XML processing.
* [args4j](http://args4j.kohsuke.org/) - Command line arguments parser. * [args4j](http://args4j.kohsuke.org/) - Command line arguments parser.
* [Gephi](https://github.com/gephi/gephi/) - A cross-platform for visualizing and manipulating large graph networks. * [CRaSH](http://www.crashub.org) - Provides a CLI for running processes.
* [Gephi](https://github.com/gephi/gephi/) - Cross-platform for visualizing and manipulating large graph networks.
* [Guava](https://github.com/google/guava) - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth. * [Guava](https://github.com/google/guava) - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.
* [JADE](http://jade.tilab.com/) - Providers a framework and an environment to build and to debug multi-agent systems. * [JADE](http://jade.tilab.com/) - Framework and environment for building and to debugging multi-agent systems.
* [javatuples](http://www.javatuples.org/) - Does what it says, although the concept of tuples in general is debatable. * [javatuples](http://www.javatuples.org/) - Tuples.
* [JCommander](http://jcommander.org/) - Command line arguments parser; its been around, active, and maintained by the creator since 2010. * [JCommander](http://jcommander.org/) - Command line arguments parser.
* [JGraphT](http://jgrapht.org/) - A graph library that provides mathematical graph-theory objects and algorithms.
* [JScience](http://jscience.org/) - Provides a set of classes to work with scientific measurements and units.
* [Protégé](http://protege.stanford.edu/) - Provides an ontology editor and a framework to build knowledge-based systems. * [Protégé](http://protege.stanford.edu/) - Provides an ontology editor and a framework to build knowledge-based systems.
## Web Crawling ## Web Crawling
*Libraries that analyze the content of websites.* *Libraries that analyze the content of websites.*
* [Apache Nutch](http://nutch.apache.org/) - Highly extensible, highly scalable Web crawler for production environment. * [Apache Nutch](http://nutch.apache.org/) - Highly extensible, highly scalable web crawler for production environment.
* [Crawler4j](https://github.com/yasserg/crawler4j) - Simple lightweight alternative. * [Crawler4j](https://github.com/yasserg/crawler4j) - Simple and lightweight web crawler.
* [JSoup](http://jsoup.org/) - Scrapes, parses, manipulates and cleans HTML. * [JSoup](http://jsoup.org/) - Scrapes, parses, manipulates and cleans HTML.
## Web Frameworks ## Web Frameworks
*Frameworks that handle the communication between the layers of an web application.* *Frameworks that handle the communication between the layers of an web application.*
* [Apache Tapestry](http://tapestry.apache.org/) - Component oriented framework for creating dynamic, robust, highly scalable web applications in Java. * [Apache Tapestry](http://tapestry.apache.org/) - Component-oriented framework for creating dynamic, robust, highly scalable web applications.
* [Apache Wicket](http://wicket.apache.org/) - Component-based web application framework similar to Tapestry with a stateful GUI. * [Apache Wicket](http://wicket.apache.org/) - Component-based web application framework similar to Tapestry with a stateful GUI.
* [Google Web Toolkit](http://www.gwtproject.org/) - Toolbox which includes a Java-to-JavaScript compiler for client-side code, XML parser, API for RPC, JUnit integration, internationalization support and widgets for the GUI. * [Google Web Toolkit](http://www.gwtproject.org/) - Toolbox which includes a Java-to-JavaScript compiler for client-side code, XML parser, API for RPC, JUnit integration, internationalization support and widgets for the GUI.
* [Grails](https://grails.org/) - Groovy framework with the aim to provide a highly productive environment by favoring convention over configuration, no XML and support for mixins. * [Grails](https://grails.org/) - Groovy framework with the aim to provide a highly productive environment by favoring convention over configuration, no XML and support for mixins.
* [Ninja](http://www.ninjaframework.org/) - Full stack web framework for Java. Rock solid, fast and super productive. * [Ninja](http://www.ninjaframework.org/) - Full stack web framework.
* [Pippo](http://www.pippo.ro/) - A small, highly modularized Sinatra-like framework. * [Pippo](http://www.pippo.ro/) - Small, highly modularized Sinatra-like framework.
* [Play](http://www.playframework.com/) - Uses convention over configuration, hot code reloading and display of errors in the browser. * [Play](http://www.playframework.com/) - Uses convention over configuration, hot code reloading and display of errors in the browser.
* [PrimeFaces](http://primefaces.org/) - JSF framework which has a free and a commercial version with support. Provides several frontend components. * [PrimeFaces](http://primefaces.org/) - JSF framework which has a free and a commercial version with support. Provides several frontend components.
* [Ratpack](http://www.ratpack.io/) - A set of Java libraries that facilitate fast, efficient, evolvable and well tested HTTP applications. * [Ratpack](http://www.ratpack.io/) - Set of libraries that facilitate fast, efficient, evolvable and well tested HTTP applications.
* [Spring Boot](http://projects.spring.io/spring-boot/) - Microframework which simplifies the development of new Spring applications. * [Spring Boot](http://projects.spring.io/spring-boot/) - Microframework which simplifies the development of new Spring applications.
* [Spring](http://projects.spring.io/spring-framework/) - Aims to simplify the development with Java EE and provides packages for dependency injection and aspect-oriented programming. * [Spring](http://projects.spring.io/spring-framework/) - Provides many packages ranging from dependency injection to aspect-oriented programming to security.
* [Vaadin](https://vaadin.com/) - Event-driven framework build on top of GWT. Uses server-side architecture with Ajax on the client-side. * [Vaadin](https://vaadin.com/) - Event-driven framework build on top of GWT. Uses server-side architecture with Ajax on the client-side.
# Resources # Resources
@ -554,11 +592,11 @@ A curated list of awesome Java frameworks, libraries and software.
* [r/java](http://www.reddit.com/r/java) - Subreddit for the Java community. * [r/java](http://www.reddit.com/r/java) - Subreddit for the Java community.
* [stackoverflow](http://stackoverflow.com/questions/tagged/java) - Question/answer platform. * [stackoverflow](http://stackoverflow.com/questions/tagged/java) - Question/answer platform.
* [vJUG](http://virtualjug.com/) - Online Java user group. * [vJUG](http://virtualjug.com/) - Virtual Java User Group.
## Influential Books ## Influential Books
*Books about Java that had a high impact and are still worth reading.* *Books that had a high impact and are still worth reading.*
* [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683) * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683)
* [Java 8 in Action](http://www.amazon.com/Java-Action-Lambdas-functional-style-programming/dp/1617291994/) * [Java 8 in Action](http://www.amazon.com/Java-Action-Lambdas-functional-style-programming/dp/1617291994/)
@ -574,9 +612,10 @@ A curated list of awesome Java frameworks, libraries and software.
## Twitter ## Twitter
*Active accounts to follow.* *Active accounts to follow. Descriptions from Twitter.*
* [Adam Bien](https://twitter.com/AdamBien/) - Freelancer: Author, JavaONE Rockstar Speaker, Consultant, Java Champion. * [Adam Bien](https://twitter.com/AdamBien/) - Freelancer: Author, JavaONE Rockstar Speaker, Consultant, Java Champion.
* [Aleksey Shipilëv](https://twitter.com/shipilev) - Performance Geek, Benchmarking Tzar, Concurrency Bug Hunter.
* [Antonio Goncalves](https://twitter.com/agoncal/) - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author. * [Antonio Goncalves](https://twitter.com/agoncal/) - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author.
* [Arun Gupta](https://twitter.com/arungupta/) - Java Champion, JavaOne Rockstar, UG Leader, Devoxx4Kids-er, Red Hatter. * [Arun Gupta](https://twitter.com/arungupta/) - Java Champion, JavaOne Rockstar, UG Leader, Devoxx4Kids-er, Red Hatter.
* [Brian Goetz](https://twitter.com/BrianGoetz) - Java Language Architect at Oracle. * [Brian Goetz](https://twitter.com/BrianGoetz) - Java Language Architect at Oracle.
@ -592,13 +631,13 @@ A curated list of awesome Java frameworks, libraries and software.
* [Lukas Eder](https://twitter.com/lukaseder) - Founder and CEO Data Geekery (jOOQ). * [Lukas Eder](https://twitter.com/lukaseder) - Founder and CEO Data Geekery (jOOQ).
* [Mario Fusco](https://twitter.com/mariofusco) - RedHatter, JUG coordinator, frequent speaker and author. * [Mario Fusco](https://twitter.com/mariofusco) - RedHatter, JUG coordinator, frequent speaker and author.
* [Mark Reinhold](https://twitter.com/mreinhold) - Chief Architect, Java Platform Group, Oracle. * [Mark Reinhold](https://twitter.com/mreinhold) - Chief Architect, Java Platform Group, Oracle.
* [Markus Eisele](https://twitter.com/myfear) - Java EE evangelist, Red Hat * [Markus Eisele](https://twitter.com/myfear) - Java EE evangelist, Red Hat.
* [Martijn Verburg](https://twitter.com/karianna) - London JUG co-leader, speaker, author, Java Champion and much more. * [Martijn Verburg](https://twitter.com/karianna) - London JUG co-leader, speaker, author, Java Champion and much more.
* [Martin Thompson](https://twitter.com/mjpt777) - Pasty faced performance gangster. * [Martin Thompson](https://twitter.com/mjpt777) - Pasty faced performance gangster.
* [OpenJDK](https://twitter.com/OpenJDK) - Official OpenJDK account. * [OpenJDK](https://twitter.com/OpenJDK) - Official OpenJDK account.
* [Peter Lawrey](https://twitter.com/PeterLawrey) - Peter Lawrey, Java performance expert * [Peter Lawrey](https://twitter.com/PeterLawrey) - Peter Lawrey, Java performance expert.
* [Reza Rahman](https://twitter.com/reza_rahman) - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker. * [Reza Rahman](https://twitter.com/reza_rahman) - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker.
* [Roberto Cortez](https://twitter.com/radcortez) - Java EE/JPA expert, speaker, open source * [Roberto Cortez](https://twitter.com/radcortez) - Java EE/JPA expert, speaker, open source.
* [Simon Maple](https://twitter.com/sjmaple) - Java Champion, virtualJUG founder, LJC leader, RebelLabs author. * [Simon Maple](https://twitter.com/sjmaple) - Java Champion, virtualJUG founder, LJC leader, RebelLabs author.
* [Stephen Colebourne](https://twitter.com/jodastephen) - Java Champion, speaker. * [Stephen Colebourne](https://twitter.com/jodastephen) - Java Champion, speaker.
* [Tim Boudreau](https://twitter.com/kablosna) - Author and NetBeans guru. * [Tim Boudreau](https://twitter.com/kablosna) - Author and NetBeans guru.