The IDE for competitive programming
IntelliJ IDEA & IntelliJ Platform
Apache NetBeans
JUCE is an open-source cross-platform C++ application framework
A fast and lightweight IDE
Nyquist is a language for sound synthesis and music composition.
jEdit is a programmer's text editor written in Java.
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Vampirio Code, a great Code Editor and Compiler
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
AndroidIDE is an IDE for Android to develop full featured Android apps
Web IDE in single HTML file
OS bootable from Linux,Windows and others partitions as auxiliary OS
Java bytecode editor
Atom package - Activate POWER MODE to write your code in style
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