Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
BeWelcome - Open your door to the world!
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Trustroots - Travellers community for sharing, hosting and getting people together.
LockOnMe - LockOnMe is a location-sharing app, displaying targets and associated Points Of Interest on maps & fun radars.
Hospitality Club - Free network of people around the world who offer free accommodation, advice and help when they are traveling - hospitality exchange. Free membership.