Library for OpenStreetMap offline rendering and routing
libosmscout offers applications simple, high-level interfaces to offline rendering and routing functionalities based on OpenStreetMap data. It does so by preprocessing *.osm data files and generating binary data and index files for fast access.
Gosmore is an OpenStreetMap navigation application. It can display the map in 2D and 3D. It also provides searching and turn-by-turn routing capabilities. All the data is stored offline in it's own binary format.