Google Calendar - Spend less time managing your day & more time enjoying it
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Lightning Calendar - Organize your life — it’s about time!
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.
OwnTracks - Cross-platform location sharing