Learn Java the easy way!
A powerful editor and graphical debugger for code written in Scilab
Kile is a feature-rich LaTeX editor
Web IDE in single HTML file
IDLE Extensions
Launch an external diff tool like WinMerge in Eclipse
Eclipse plugin for VCS ClearCase
A lightweight programming environment for Java
Vim-like editing in Eclipse
Simple Web-based environment for PHP scripting in programming class
Pure Trait-based Programming on the Java Platform