Open-source, cross platform Qt based IDE for reverse-engineering
JUCE is an open-source cross-platform C++ application framework
C++ Qt ORM (Object Relational Mapping) and ODM library
Simple and flexible programming language for applications development
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Fractals generator with powerful functionality.