HyperTrack - Build logistics apps that feel like the future
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
OwnTracks - Cross-platform location sharing
LocationAPI - Instantly locate any device w/ WiFi, celltowers & IP address
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...