diff --git a/guide/english/developer-tools/index.md b/guide/english/developer-tools/index.md
index 797215a68a..6fe06d754a 100644
--- a/guide/english/developer-tools/index.md
+++ b/guide/english/developer-tools/index.md
@@ -3,7 +3,7 @@ title: Developer Tools
 ---
 ## Developer Tools
 
-In this section, we'll explain a wide variety of tools used by developers.
+In this section, we'll explain a wide variety of tools used by developers. Many of them are free or open sourced!
 
 Some examples of these tools:
 - Version control systems