KDE Itinerary - Digital travel assistant with a priority on protecting your privacy
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Onward Ticket - Onward Ticket is a web and mobile platform that enables individuals to package travel into single itineraries.
Wherezat - Wherezat is Fast, free, and easy way to share your location with your friend or family.
JetRadar - Compare flights from hundreds of airlines & travel agencies
Zenly - Zenly is a GPS tracker to locate your friends in realtime.