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.

Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.

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.

Zenly - Zenly is a GPS tracker to locate your friends in realtime.

Traccar - Traccar is an open-sources modern GPS tracking platform written in Java and available to use on multiple platforms such as Linux, Mac OS and MS Windows etc.

OwnTracks - Cross-platform location sharing