Viking is a free/open source program to manage GPS data
Free software for maps
An information system for cyclists in Berlin and Brandenburg
Plugins for OpenCPN
ERSI Shapefile Viewer
A small nifty program where you build you own ZOO
Geodesy based library (geodetic and geocentric functions)
CAD 2D for Land Surveying and Civil
OpenSeaMap Depth Contours
Syntax2D (latest ver. 1.3.7.0)
CAD 2D for Land Surveying,Civil and more
Reclassify Map Grids (rasters)
Get map grid (raster) information: size, value summaries, frequencies
Reclassify raster maps