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Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Radar - Radar - Location sharing for friends and teams.
OwnTracks - Cross-platform location sharing
HyperTrack - Build logistics apps that feel like the future
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
LocationAPI - Instantly locate any device w/ WiFi, celltowers & IP address