GPLIGC is a program for analyzing IGC flight data from GNSS flight data recorders used by glider pilots. It uses Perl/Tk and gnuplot. The openGLIGCexplorer (written in C++) allows one to view the data in 3D with OpenGL, and can also be used as a digital elevation model terrain viewer. It can also be used for off-screen rendering of 2D and 3D images of flight tracks or terrain/map data.
The SLAN project is focused on developing a flexible open source Virutal Private Networking system, primarily for securing Internet uplinks which use broadcast media such as 802.11 wireless links or public/shared ethernets. The system is flexible enough to support traditional VPN applications as well. As well as featuring an open design and strong security, the SLAN project hopes to eventually provide support for all major computing platforms.
Divetools is a set of tools to read out a dive computer. In addition it includes a conversion program that makes UDCF files out of thet dump and a Plotting tool that produces nice PostScript pages for your loogbook. It supports the Suunto EON and Uwatec Aladin Series dive computers.