Cross platform (lin/win/mac) geographical information system (GIS)
Open-source satellite tracker and pass predictor for Android
In-depth attack surface mapping and asset discovery
Organic Maps is a free Android & iOS offline maps app for travelers
A high-performance, feature-packed library for all your mapping needs
Ultra Fast Geospatial Database & Geofencing Server
Large-scale WebGL-powered geospatial data visualization analysis
Open source cross-platform Java Visual Traceroute
Viking is a free/open source program to manage GPS data
Bootable linux distro for Geospatial Applications
Free minimalist software for maps, import DWG, DXF, SHP, KML, GeoJSON
Minimalistic wide-open GPS-locator/tracker
Open Source Desktop GIS with Surveying and Cartography Functionality
A software package for quantitative analysis in Panbiogeography
Create, edit view GPX tracks (in the background - online maps)
A C library for parsing/normalizing street addresses around the world
Plugins for OpenCPN
Analysis and display of Census, business, government attribute data
A small nifty program where you build you own ZOO
A library to generate short codes
Automated detection of the unknown early map projection
A reference implementation of the Polish geobotanical grid