Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
It's On Meet - Unlock who you want to meet by accepting a drink or not
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
OwnTracks - Cross-platform location sharing
FriendsTonight - Meet new friends to join your friends, tonight