2D & 3D TeX-Aware Vector Graphics Language
Draw vector graphics to scale using a descriptive language
2D CAD software
Cross Platform GUI Toolkit
Professional quality open source illustration software
A graphical Finite State Machine (FSM) designer.
Free drawing software for Windows, Mac OS X, and Linux
Delphi version of famous free embroidery-digitizing software: Thred
A powerful C++ class library for image manipulation
Open Source CAD