What is tangoGPS?
tangogps is an easy to use, fast and lightweight mapping application for use with or without GPS.
It runs on any Linux platform from the desktop over eeePC down to phones like the Openmoko Neo.
By default tangoGPS uses map data from the Openstreetmap project. Additionally a variety of other repositories can be easily added.
The maps are automagically downloaded and cached for offline use while you drag or zoom the map. Furthermore you can conveniently pre-cache areas with tangoGPS.
Since May 2 2012: domain seems to be dead