Cross platform (lin/win/mac) geographical information system (GIS)
In-depth attack surface mapping and asset discovery
Large-scale WebGL-powered geospatial data visualization analysis
Ultra Fast Geospatial Database & Geofencing Server
Viking is a free/open source program to manage GPS data
Open source cross-platform Java Visual Traceroute
Bootable linux distro for Geospatial Applications
Free software for maps
Open Source Desktop GIS with Surveying and Cartography Functionality
A software package for quantitative analysis in Panbiogeography
Automated detection of the unknown early map projection
A low ram maps downloader to keep your ram free.
Create, edit view GPX tracks (in the background - online maps)
Minimalistic wide-open GPS-locator/tracker
Plugins for OpenCPN
A C library for parsing/normalizing street addresses around the world
A small nifty program where you build you own ZOO
Analysis and display of Census, business, government attribute data
A library to generate short codes
A reference implementation of the Polish geobotanical grid
a space-time interpolation geostatistical tool
GeoData Web Editing [core SIG Web]