Wikipedia is a free, multilingual encyclopedia project operated by the non-profit Wikimedia Foundation. Its name is a portmanteau of the words wiki (a technology for creating collaborative websites) and encyclopedia. Wikipedia's 10 million articles, about a quarter of which are in English, have been written collaboratively by volunteers around the world, and almost all of its articles can be edited by anyone who can access the Wikipedia website. Launched in 2001 by Jimmy Wales and Larry Sange...
Your favourite external commenting service goes here! I recommend http://www.disqus.com