2D & 3D TeX-Aware Vector Graphics Language
Model Railway CAD program
JaxoDraw: Feynman Diagrams made easy!
Draw vector graphics to scale using a descriptive language
Another drawing editor for LaTeX with PSTricks & TikZ
Simple and intuitive 2D vector drawing for electronics and not only.
Former project page
A graphical Finite State Machine (FSM) designer.
Free drawing software for Windows, Mac OS X, and Linux
automata editor
Open Source CAD