JaxoDraw: Feynman Diagrams made easy!
Another drawing editor for LaTeX with PSTricks & TikZ
Bar Code (1D or 2D) generator in pure Ada
Vector drawing program for LaTeX using PSTricks
Cross Platform GUI Toolkit
The working version of Sodipodi for Windows 7 and 10.
Former project page
A graphical Finite State Machine (FSM) designer.
Advanced script editor IDE for squirrel/pawn/lua and more
A powerful C++ class library for image manipulation
The X3DV Module Suite is a free set of Netbeans modules to code in X3D