FigCraft: interface design and prototyping
A free, high-quality, and portable font engine
Draw vector graphics to scale using a descriptive language
2D & 3D TeX-Aware Vector Graphics Language
Model Railway CAD program
Powerful desktop publishing software
A premier mind-mapping software written in Java
Swiss army knife of image processing
JaxoDraw: Feynman Diagrams made easy!
3D Engine c++
A simple LaTeX {picture} drawing tool
GPS log file viewer and analyzer
Display, convert, and edit raster image and vector image files
Cross Platform GUI Toolkit
Another drawing editor for LaTeX with PSTricks & TikZ
Toolkit for working with and mapping geospatial data