Below is a list of major active media websites – Based on General Interest & World Ranking
Facebook: Founded by Mark Zuckerberg, Facebook was designed as a social networking site for Harvard students. After spreading from Harvard through the university ranks and down into high school, Facebook was opened to the public in 2006.
MySpace: Started in 2003, MySpace was a driving force in popularizing social networking and still maintains a large userbase. A highly customizable social network, MySpace continues to reposition itself in the industry
Twitter: What started out as a microblogging website has quickly grown into a social messaging platform and one of the top social networks in the world. Twitter is phenomenon that transcends social networking to provide an outlet for news, trends, buzz, and chat among many other uses.
LinkedIn: A business-oriented social network, members invite people to be “connections” instead of “friends.” Linkedin is a contact management system as well as a social network, and has a question-and-answer section similar to Yahoo! Answers
Ning: A social network for creating social networks, Ning takes the idea of groups to a whole new level. The ability to create your own community makes Ning a great home away from home for organizations and groups looking to fill the social void.
Last.fm: Billing itself as a social music site, Last.fm allows members to create their own radio station that learns what the person likes and suggests new music based on those interests. In addition to this, you can listen to the radio stations of friends and other Last.fm members.
Xanga: A social blogging site that combines social networking elements with blogging. Members earn credits for participating in the site and can spend credits on various things such as buying mini-pictures to post in the comments of a friend’s blog.