The most impressive websites in the world use 3D graphics
Read, write and edit metadata
Powerful desktop publishing software
Swiss army knife of image processing
A portable, multi-platform, command-line driven graphing utility
An award-winning drawing program for children of all ages
Panorama photo stitcher
FlightGear Flight Simulator: free open-source multiplatform flight sim
a parametric 3D CAD modeler
GPS log file viewer and analyzer
3D Engine c++
GTK+ comic book viewer.
Model Railway CAD program
Lyric projection and chord charts for church musicians