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.
c:geo - c:geo is simple yet powerful unofficial geocaching client for Android devices.
iCaching - iCaching is the all-in-one Geocache manager for the Mac.
GlobalBucket - Application for sharing the nicest places and the best activities on earth.
Cachly - Join the treasure hunt with the essential geocaching partner for iOS