Wikipedia

Founded in 2001, Wikipedia became the most successful collaborative online encyclopedia. Founded by Jimmy Wales and Larry Sanger, the website has managed to become the most popular and widely used general reference site online. Currently Wikipedia has 17 million articles posted online that have been written by a collaborative worldwide effort appearing in multiple languages. Being a community site, most of the articles can be directly accessed and edited by anyone visiting the website. It is currently the seventh most viewed website online and has roughly 365 million readers.