OpenGL Mathematics (GLM)
A powerful, free and open-source tool for TextureAtlases/Spritesheets
A basic math model of 3D system
rayshade and POV for Mathematica Export + view
Deep paint and stop-motion animation software
Syntax Tree Drawing Software (Linguistics)
GladivsSC is a simple and lightweight screen capture application.
Gphoton in a simple 3d modeler and ray tracer.
PHIGS (Programmer's Hierarchical Interactive Graphics System)
Multimedia asset management and manipulator for Étoilé
Easily creates high complex fractal images. Includes 3D prototypes.
an interactive 3D viewing program
3D game engine for C and C++
Computer vision and image processing library for Qt.
A 3D rendering / entity engine