JUCE is an open-source cross-platform C++ application framework
LiteIDE is a simple, open source, cross-platform Go IDE
mawww's experiment for a better code editor
Real Time Electronic Circuit Simulator.
Nyquist is a language for sound synthesis and music composition.
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Simple and flexible programming language for applications development
Fractals generator with powerful functionality.
Octave Eclipse GUI
develop with the terminal falvor