The IDE for competitive programming
Kisekae UltraKiss is a full featured integrated development environmen
Learn Java the easy way!
Launch an external diff tool like WinMerge in Eclipse
Lightweight IDE for Java
A simple Bash IDE / Debugger
Programming in MS Paint
Codenvy
Jxt4RunPlusJ is a source code editor and creator.
Lua Editor
Set of hints and refactor features for Java language in NetBeans IDE