Cross platform (lin/win/mac) geographical information system (GIS)
Open Source Routing Machine - C++ backend
Interactive, thoroughly customizable maps in the browser
Geographic library
GPS log file viewer and analyzer
Navigational Algorithms - Marine navigation
Build your own GPS unit
GWC is a tile server and caching proxy written in Java
An information system for cyclists in Berlin and Brandenburg
Open Source Desktop GIS with Surveying and Cartography Functionality
... the open-source glide computer
Geographic feature extraction and data mining
Handling and basic analysis of hyperspectral data in R
Automated detection of the unknown early map projection
Visualize deep ocean biogeochemical sediment samples in 2D and 3D!
Minimalistic wide-open GPS-locator/tracker
Read EDF File / view mapping
LaMa - A Localization and Mapping library
Adjustment of local surveying networks, binary builds for Windows
A GUI for the freeware Geographical Information System PCRaster
A C library for parsing/normalizing street addresses around the world
Interactive visualization of plate tectonics.