Free yourself
Colour matching/mixing toolkit for modellers
XBM images are displayed in actual size and in an enlarged edit grid.
Cross platform BrakeOut with level editor
Free drawing software for Windows, Mac OS X, and Linux
A world editor for HGE game engine written in python and uses OpenGL.
Hand Written Equation Creator
A unique python-based image editor
2D space game with semi-realistic physics
Metadata (EXIF, XMP, IPTC) editor, Geotagger, Publisher
cross platform latex-to-bitmap-to-clipboard gui
Inkscape extension to add and edit GNUplot graphs
A tool written in Python to draw Splines in MAXONs Cinema 4D