Ultra Fast Geospatial Database & Geofencing Server
Open-source JavaScript library for mobile-friendly interactive maps
PCRaster environmental modeling software
Geostatistics and geosciences modeling software
Tools for reading, validating & writing transit schedule info in GTFS
Open Source Marine Chart Plotting Program
Free image and chart digitizer
Open Street Map (OSM) tools, OSM/XML parser, tag extractor
A frontend for gpsbabel
compeo++ - Manage Flytec/ Bräuniger Instruments
OsmSharp - OpenStreetMap (OSM) Library and Tools developed in C#