Benchtest.Com Hobby site dealing with CPU watercooling. Several examples of home built watercooling equipment, as well as information on fabricating waterblocks, radiators and resevoirs. http://www.benchtest.com

Swiftech Company which fabricates and sells watercooling equipment. Also provides pre-built watercooled systems to the end user. http://www.swiftnets.com/

BE Cooling Manufacturer of the Aquastealth watercooling system for PCs. Provides product information, watercooling basics and technical support http://www.parrett.net/becooling/

DangerDen Manufacturer of watercooling kits and waterblocks, radiators and other watercooling equipment. http://www.dangerden.com/

Water Cooling Devoted to water cooling a computer. http://www.aasdcat.com/rstaph/cooling/

Tekheads UK Selling watercooling, overclocking bits, and case modding parts throughout the UK and Europe. http://www.tekheads.co.uk

Cooltechnica.com Selling watercooling products and fully customizable AquaXtreme Water-Cooling Kits. http://www.cooltechnica.com

Bobnifty's World HQ Tutorials on CPU watercooling, hardware modifications and case modifications, like window cutting and painting. http://bobnifty.tripod.com/

Athlon Watercooling Adventures Details the installation and testing of a water cooling apparatus for a AMD Athlon processor. http://www.nyx.net/~smanley/watercool

Extrememhz.com PC cooling and tech source specializing in water cooling. http://www.extrememhz.com

ICEe Computers Water cooling and case modding information. http://www.iceepc.com

Watercooling 101 Forums, reviews, guides on watercooling. http://www.wc101.com

Overclockers.com - Watercooling Section Several reviews and user tips on water-based cooling systems for PCs. http://www.overclockers.com/topiclist/index31.asp#WATER%20COOLING

ThermoChill ThermoChill is a manufacturer of PC watercooling equipment and case modification hardware. http://www.thermochill.com

Horse of Iron, Inc. Manufacturer of cases, fans and watercooling hardware. Pictures on web site show detailed information of products. http://www.horseofiron.com

Acadia Technology Inc. Provides a thermal solutions including CPU coolers, aluminum cases, thermal electric coolers, power supplies, and accessories. http://www.globalwinusa.com