Graphics

Open CASCADE - A geometric modeling SDK available on Linux including geometric data structures, modeling algorithms and a shape viewer.
http://www.opencascade.org

3D Scene - Illustrates most of the modeling, illumination, and rendering 3D objects. Covers Z-buffer, Shading, Phong illumination, and Ray Tracing.
http://www3.telus.net/Voiculescu/scene_3d/index.html

RTEQ - A free (GPL) Real Time Equalizer.
http://members.aon.at/grxpage

JPEG Pixel Interpolator - Interpolate defects (pixels, dots, stripes) in JPEG images with minimal quality loss.
http://www.zero-based.org/software/jpegpixi/

OpenDX - Open source visualization software package based on IBM's Visualization Data Explorer.
http://opendx.org

Chart2D - A library written in Java for adding two dimensional charts to Java programs.
http://chart2d.sourceforge.net

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.
http://umlautllama.com/project.php?ShortName=4P

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]
http://hme.sourceforge.net/

Coriander - GUI to control an IEEE1394 Digital Camera and handle its video output. Features, screenshots, manual, and download.
http://damien.douxchamps.net/ieee1394/coriander/

MayaVi - Scientific data visualizer written in Python
http://mayavi.sourceforge.net/

Fandango - Python scripted 3D CAD engine. Description, requirements, download, links.
http://www.soffernet.com/jaime/fandango/

Altaxo - Data analysis and plotting program (C#) [Windows].
http://altaxo.sourceforge.net/

Project IDOL - An OpenGL project done under the Linux system that tries to develop an open source CAD software.
http://balder.prohosting.com/~projidol/