Associations
- Geocaching – Groundspeak, Inc.
- TrigpointingUK – Trigpoint Logging System
- GAGB – Geocaching Association of Great Britain
Caching Dictionaries
- Geocaching.com – Groundspeak’s dictionary
- Geocaching Junkie – A blog of the travels and adventures of a Geocacher
Numbered Series
- Church Micro Series – A series of geocaches placed close to churches.
- Fine Pair Series – A series of geocaches placed close to a red telephone box and a red post box.
- Little Bridges Series – A series of geocaches placed close to small footbridges.
- SideTracked Series – A series of geocaches place close to train stations.
- War Memorial Series – A series of geocaches placed close to war memorials.
- Village Hall Series – A series of geocaches placed at or near village halls or community centres.
- Village Signs Series – A series of geocaches placed close to a village sign.
- Ye Ole Survey Monuments Series – A series of geocaches placed close to trig points.
Other Groups
- Manx Geocaching – The incredibly friendly cachers of the Isle of Man
- Geocaching Ireland – A great group of welcoming cachers
Puzzles
- Boxentriq – Code-Breaking, Cipher and Logic Puzzles solving tools
- dCode.xyz – Various Solvers (the cachers goto page for puzzles)
Snag the Tag
- Snag the Tag – Hunt the Tag and Snag a prize
- Snag the Tag Twitter account – Twitter account for Snag the Tag
- Snag the Tag on Face book – Facebook page for Snag the Tag
Tools
- Project GC – A host of online tools and stat generators
- Geocaching Toolbox – A pretty comprehensive online tool set for Geocaching
- GSAK (Geocaching Swiss Army Knife) – Windows Geocaching management tool
- iCaching – Mac Geocaching management tool
- Open Cache Manager – Linux Geocaching management tool (Free & Open Source)
- Groundspeak Wiki – Regional Geocaching Policies for the UK & useful guidelines
- Lab2GPX – Generates a GPX file containing Geocaching Adventure Labs
- TBScan A quick and easy way to scan and enter Trackables
- Geooh Go Android app with lots of tools, requires a Premium membership to use
- C:geo Essential Android app for the Geocacher on the move
- Cachly Essential iPhone app for the Geocacher on the move
- CacheSleuth Some very useful tools here