FlightGear Flight Simulator: free open-source multiplatform flight sim
Panorama photo stitcher
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
GPS log file viewer and analyzer
C++ library for half precision floating point arithmetics.
Scan documents to PDF and other file types, as simply as possible.
a parametric 3D CAD modeler
Tool to create bitmaps and fonts for embedded applications.
2D & 3D TeX-Aware Vector Graphics Language
A batch image converter and resizer
2D Animation Tool for Children and Teenagers
Model Railway CAD program
Advanced PNG optimization program
Emgu CV is a cross platform .Net wrapper for OpenCV