Play Munzee - Similiar to Geocaching but requires players scan a QR Codes instead to validate find.
GSAK (Geocaching Swiss Army Knife) - GSAK is the all in one Geocaching and waypoint management tool.
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.
FlagStack - You can deploy and capture (virtual) flags all over the world. Join the scavenger hunt and have fun!
iCaching - iCaching is the all-in-one Geocache manager for the Mac.
Sighter - Sighter is a social, outdoor treasure hunting activity, where you can play hide and seek with...