Height Map Editor - Edits, generates, and manipulates terrain height maps. These can be used in terrain renders, which are used in games, applications, and demos. Web based manual available. [Windows and Linux].
JPEG Pixel Interpolator - Interpolate defects (pixels, dots, stripes) in JPEG images with minimal quality loss..
MayaVi - Scientific data visualizer written in Python.
Open CASCADE - A geometric modeling SDK available on Linux including geometric data structures, modeling algorithms and a shape viewer..
OpenDX - Open source visualization software package based on IBM's Visualization Data Explorer..
4P: Pixel Pushing Paint Program - A clone of the Amiga version of the Electronic Arts' product, "Deluxe Paint". A low-resolution, low color-depth paint program..
Project IDOL - An OpenGL project done under the Linux system that tries to develop an open source CAD software..