Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...

Geocaching - Geocaching is the premier app for locating geocaches. This app is available for both the Android and iOS platforms, and it makes locating these popular hidden treasures easy and fun.

Star Walk - Star Walk – Sky View: Explore the Stars.

Ingress - Winner of the Grand Prize at the 2015 Japanese Media Arts Festival Ingress transforms the real world into the landscape for a global game of mystery, intrigue, and competition. Our future is at stake.

Stellarium - Stellarium is a free open source planetarium for your computer.

Sighter - Sighter is a social, outdoor treasure hunting activity, where you can play hide and seek with...