Google Webmaster Guidelines - Following these guidelines will help Google find, index, and rank your site.

Yahoo Webmaster Guidelines - Yahoo! Search Content Quality Guidelines are designed to ensure that poor-quality pages do not degrade the user experience in any way. 

MSN Live Webmaster Guidelines - This is your gateway to help with Live Search.

Wikipedia (pronounced /?wi?ki?pi?di?/ or /?w?ki?pi?di?/) is a multilingual, web-based, free content encyclopedia project.

Adobe Systems Incorporated offers business, creative, and mobile software solutions

Microsoft are committed long term to the mission of helping our customers realize their full potential.

Nominet is the Internet registry for .uk domain names

The BBC  - The gateway to BBC Online.

Ask - Offers search for web sites, images, news, blogs, video, maps and directions, local search and shopping.

Cisco is the leading supplier of networking equipment and network management for the Internet.

Alexa the Web Information Company

Current TV has been the world's leading peer-to-peer news and information network.