Open Source GLSL (OpenGL Shading Language) Graphic Design Software

This is a photo editing application for Symbian, written in Qt. It's especially designed for the Pureview 808 smartphone. It lets you edit photographs up to very high resolutions. The editing tools are primarily aimed at amateur photographers, so: filtering for different light levels, colours etc. You can't do things like paint on top of photographs or combine 2 photographs together.

QuickShader is a program that allows you to write and test shaders without creating your own rendering engine. Using this tool you can quickly create many shaders based effects (i.e. phong lighting/shading, normal mapping, parallax occlusion mapping, pn-triangles and many more) that are used in modern games and simulations. Unfortunately program is restricted to shaders only, single pass pipelined effects. Effects based on postprocessing, blending and other techniques are currently unavailable (are planned for future releases).

Arkeos Scene Editor 3D is a scene editor for creating game with Ogre 3D. It's created with Purebasic.

GLIP-Lib is an OpenGL image processing library written in C++. It features all the necessary tools to quickly build texture filters and pipelines and operate them on the GPU.