Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
OurPact - Parental Control for apps and devices
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
FamilyTime - FamilyTime is one of the best parental controlling application and family tracking application and finder at the moment available over the internet.
OwnTracks - Cross-platform location sharing
Kidslox - Set boundaries for your kids