Geocaching

Boulter Geocaching
Has several useful tools such as coordinate converter and mapper, quick search, coordinate grabber, distance calculator, Bay Area geocaching leaders, expertGPS calibrated maps and geocaching express logger.
http://www.boulter.com/geocaching/

Buxley's Geocaching Waypoint
Explanation of the sport, collection of recent news stories, maps of cache locations, FAQ, and announcements of geocaching parties and events.
http://www.brillig.com/geocaching/

Cache-A-Maniacs
Features recorded episodes in a candid, uncut, and irregular form with a member of the Geocaching community.
http://www.cacheamaniacs.com/

CacheboxStore.com
Providing a resource of geocaching containers, travel bugs, and accessories.
http://www.cacheboxstore.com

CacheMagnet
Open source geocaching waypoint management software.
http://cachemagnet.googlepages.com/

CacheMate
Geocaching database for Palm OS, Pocket PC, and Windows Smartphone.
http://www.smittyware.com/intro/cachemate/

Cacheopedia
A wiki-based online encyclopedia, reference, and guide.
http://cacheopedia.com/wiki/Main_Page

EarthCache
A special place that people can visit to learn about a unique geoscience feature or aspect of our Earth.
http://www.earthcache.org/

geo-*: Rick Richardson's Linux tools for geocaching
A set of tools to be used in a batch or cron mode to establish normal caching routine, backup caches and cache logs as well as enter new waypoints, a free geocoder and create custom maps of waypoints.
http://geo.rkkda.com/

GeoBuddy
Geocaching software that displays all the geocaches in your area over topo maps and aerial photos for trip planning.
http://www.geobuddy.com/

Geocache Rating System
Tool for helping geocachers rate the overall and terrain difficulty of their hidden caches.
http://www.clayjar.com/gcrs/

Geocache simulator
Features a simulator that enables you to navigate a GPS while training geocaching.
http://web.telia.com/~u32007998/geocache/

GeoCacher - GeoCaching South Africa
Features general information about geodashing, etiquette, creed, safety tips, and a fanshop.
http://www.geocacher.co.za/

Geocacher University
Provides information about basic caches, equipment, events, resources, photos, items for sale and links.
http://www.geocacher-u.com/

The Geocachers Creed
Designed to help orient new players to the ethos of the community and to guide experienced players in questionable situations.
http://www.geocreed.info/

GeoCaching Flickr Group
Brings related pictures, discussions and a map.
http://www.flickr.com/groups/geocaching/

GeoLex - The Lexicon of Geocaching
Features a glossary of geocaching terms.
http://geolex.locusprime.net/

GeoQO
A free geographical waypoint management software set that lets you manage geocaches and other types of geographical data.
http://www.geoqo.org/

GPS - The Movie
A film based on GPS treasure hunting.
http://www.gpsthemovie.com/

GPS Adventures
Learn about traditional and modern navigation, explore ways GPS is used, find out where the technology is heading in the future, and discover geocaching.
http://www.gpsmaze.com/

GPSgames.org
Features a variety of games involving use of GPS receivers, including geocaching, geodashing, minutewar, geopoker and geogolf.
http://gpsgames.org/

GSAK (Geocaching Swiss Army Knife)
A geocaching and waypoint management tool. Major features include: multiple databases, sending/receiving waypoints to GPSr, Google maps, conversion to many mapping formats, PDA and HTML output. Runs on Win98, ME, NT, 2000, XP, Vista.
http://www.gsak.net/

Handicaching
Aims to improve the accessibility of geocaching for physically handicapped people all over the world.
http://www.handicaching.com/

Local Geocache Groups
Directory attempts to show known local geocache groups from around the world.
http://www.geocities.com/geocachegroups/

My Geocaching Profile.com
Allows geocachers to create a detailed geocaching profile that displays their cache statistics and special accomplishments in a clear, attractive layout.
http://www.mygeocachingprofile.com/

Navicache
Provides a wide range of information and listing resources for the geocaching enthusiast including worldwide cache listing.
http://www.navicache.com/

PodCacher
A weekly audio show about geocaching.
http://podcacher.com/

Saudi_Cacher
Stories of found and placed caches in the Middle East.
http://saudicacher.blogspot.com/

Skrýšotlač (CachePrinter)
Free Java-based programme used for downloading and printing listings of geocaches from geocaching.com and export their coordinates to GPX format.
http://cacheprinter.bubbles.sk/

TerraCaching
Caches rated by members to encourage memorable and challenging hunts. Includes a wiki, map, and how to become a member section.
http://www.terracaching.com/

Tourality
A freeware GPS game for mobile phones that leverages the Geocaching concept and additionally suppports real-time multiplayer games.
http://tourality.com/

Waymarking
Provides tools for you to catalog, mark­ and visit interesting and useful locations around the world.
http://www.waymarking.com/