Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
NumWorks - The graphing calculator that makes learning math easier.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Paperspade - Type math easily through just English text!
OwnTracks - Cross-platform location sharing
Fact Flow - Simple solution to help kids achieve math fluency