Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
iOS Design Kit - The newest library of native iOS templates
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Sketch Repo - Collection of resources for anyone who uses Sketch
OwnTracks - Cross-platform location sharing
SketchApp.rocks - Index of all awesome things related to Sketch.