Citizen - Stay safe with instant alerts about nearby crime
GeoSpark - Location tracking SDK with 90% less battery drain 🔋
Companion - Never walk home alone
Pilgrim SDK - Foursquare's superpower is now available to all developers
PING - PING (Partimage Is Not Ghost) is a free software Linux-based live CD ISO built upon the partimage...
Hit Me Up! - Get notified when your friends arrive/leave a location!