Accurately Locate Smartphones using Social Engineering
... the open-source glide computer
Transport coordinate between earth(WGS-84) and mars in china(GCJ-02)
Minimalistic wide-open GPS-locator/tracker
A C library for parsing/normalizing street addresses around the world
Land survey field crew data management for .RAW and .JOB file types.
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
FAA digital chart viewer for iPhone and iPad
a free and open map of wireless communicating objects