Model Railway CAD program
JaxoDraw: Feynman Diagrams made easy!
A web interface to create custom vector-based visualizations
Another drawing editor for LaTeX with PSTricks & TikZ
CAD application for Technical Drawing exercises
The swiss army knife of vector graphics scripting
Simple and intuitive 2D vector drawing for electronics and not only.
JavaScript vector library
Free drawing software for Windows, Mac OS X, and Linux
Interactive designer for Celtic knots
Vector based drawing software designed for RPGs