GpsDiffuser is a software that diffuses real-time GPS data and can play file containing GPS data.Diffusion is done by sending sentences at format NMEA 0183 using UDP protocol. Diffused data come either from a GPS receiver or source issuing on UDP in real time navigation mode, either from a replayed file.In case of replay, position and speed settings are modifiable. GpsDiffuser is at least compatible with itself, GeoVisu and GpsGate.