All Web 2.0

OkCupid

OkCupid is a free-of-charge social networking and dating website, which also offers features including user-generated content such as blogging and member-created quizzes. OkCupid users are presented with questions (most of which are authored, submitted, and vetted by members) about various topics such as politics and tastes page by page, and given a list of up to four answers per question to choose from. They are also asked "How would your Ideal Match answer this question?", and then "How impor...

Facebook

Facebook is a popular, free-access social networking website that is operated and privately owned by Facebook, Inc. Users can join networks organized by city, workplace, school, and region to connect and interact with other people. People can also add friends and send them messages, and update their personal profile to notify friends about themselves. The website's name refers to the paper facebooks depicting members of a campus community that some US colleges and preparatory schools give to inc...