Sprint Family Locator - Sprint Family Locator is a multipurpose family locating application where first you need to connect all of the smartphones being used by your family members so that you can track them in case of emergency.
Prey - Prey is the simplest and most reliable solution for tracking, data protection & management for Windows, Mac, and mobile devices. Track with precise location, wipe, reset and secure devices across all platforms.
T-Mobile FamilyWhere - With the usage of this simple family locating and family finder application you can find other connected users on an account by location on a map.
Android Lost - Remotely control your Android phone from the internet or by SMS. Features:
MamaBear - MamaBear is one of the best family locator and family finder application for the iOS and Android smartphones and tablet devices.
iLostFinder - iLostFinder is an anti-theft/lost app for iPhone and iPad.