Phoenix is a modern open-source Code Editor for the web
IntelliJ IDEA & IntelliJ Platform
Apache NetBeans
Copybara: A tool for transforming and moving code between repositories
A tool to help eliminate NullPointerExceptions (NPEs) in your code
Ct.js is a desktop game engine that makes learning programming fun
A fast and lightweight IDE
The IDE for competitive programming
Fast Binary Encoding is fast and universal serialization solution
Vampirio Code, a great Code Editor and Compiler
jEdit is a programmer's text editor written in Java.
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Nyquist is a language for sound synthesis and music composition.
AndroidIDE is an IDE for Android to develop full featured Android apps
The allRound pocket sized CodeEditor.
Web IDE in single HTML file
Java bytecode editor
A multi-language code editor with syntax highlighting and templates.
An open source gui frontend application for GNU Octave
Mini Java IDE and Swing builder