Model Railway CAD program
JaxoDraw: Feynman Diagrams made easy!
A simple LaTeX {picture} drawing tool
Cross Platform GUI Toolkit
A bunch of unofficial icons based on Google's Material Design Icons.
Another drawing editor for LaTeX with PSTricks & TikZ
Vector drawing program for LaTeX using PSTricks
Simple and intuitive 2D vector drawing for electronics and not only.
A graphical Finite State Machine (FSM) designer.
Free drawing software for Windows, Mac OS X, and Linux
Interactive designer for Celtic knots
Output Processing script from Java AWT/Swing paint call
Filtered is a tool for editing SVG filters
A powerful C++ class library for image manipulation