XPaint is a simple paint program for X, suitable for producing simple graphics. It does offer some advanced features such as image processing functions and gradient fill. XPaint was originally written by David Koblas.
Stereo 3D wireframe projection of 4D objects. Rotations about the 6 planes of various 4D(R4) objects in Java. Uses documented file format for the 4D objects. Supports alternating lcd shutter 3D glasses and the red-blue 3D glasses. No 3D monitors yet. If you wish to contact me regarding this project, do. It is a joint project. Project is unchanged as of July 2007. Got hypot() and perspective wrong.
dxflib is an opensource C++ library for reading and writing AutoCAD (R) DXF files. It provides the functionality to read and write many basic entities as well as information about layers and blocks. From the author of QCAD.