Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
MuscleWiki - Understand your body, simplify your workouts
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Rejoy Health - Digital clinic to treat and manage back and joint pain
OwnTracks - Cross-platform location sharing
PainScale - Find treatments for your chronic pain