OpenCPN / OpenCPN

A concise ChartPlotter/Navigator. A cross-platform ship-borne GUI application supporting * GPS/GPDS Postition Input * BSB Raster Chart Display * S57 Vector ENChart Display * AIS Input Decoding * Waypoint Autopilot Navigation

rswinkle / PortableGL

An implementation of OpenGL 3.x-ish in clean C

OSGeo / grass

GRASS - free and open-source geospatial processing engine