Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
The Product Management guide - A book on how to create and ship products that people love
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Intercom on Product Management - The ultimate resource for aspiring product managers
OwnTracks - Cross-platform location sharing
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.