GSAK (Geocaching Swiss Army Knife) - GSAK is the all in one Geocaching and waypoint management tool.
c:geo - c:geo is simple yet powerful unofficial geocaching client for Android devices.
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.
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