Facebook Safety Check - Connect with friends and loved ones during a disaster
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
WOVER - An intelligent personal emergency platform
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
Augurisk Now - Localized crime and natural disaster risk alerts
OwnTracks - Cross-platform location sharing