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.
A social network with an event organization theme, Meetup allows members to organize anything from political rallies to spontaneous bar hopping.
A music-oriented social networking site, Mog allows members to upload their playlists and keeps track of what members are listening to on their computer.
A social network targeted at a person's real world social network, Multiply offers blogging, photo sharing, book and movie reviews, with an emphasis on sharing these not with the public at large, but with your friends and family.
Launched in 1998, MyFamily focuses on the family unit as a social network and helps families that are spread out all over the country and the world keep in touch. A very Web 1.0 feel to the network, MyFamily is entering beta on a new Web 2.0 look and feel.
Targeted at finding lost friends, family, and old classmates, Reunion is one of the few social networks that require payment for premium features usually found for free on other social networks. According to the wiki entry for Reunion
, they once had an F rating with the Better Business Bureau for misleading business practices.
Concentrating on social music, Soundpedia allows users to upload their playlists, search for new music, and view the playlists of their friends.
A social network dedicated to social activism, Take Part was established by Participant Media, the company behind such films as An Inconvenient Truth and Syriana.
An acronym for "Where Are You Now?", WAYN is a social networking site aimed at travelers around the world.
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.
A business-oriented social networking website similar to LinkedIn, most of Xing's users are located in Germany.