Social bookmarking, create personal directories for private or to share. - (Read more)

Radically short ratings and reviews - in 160 characters or less. See what people are saying about your favorite books, games, movies and music. Connect your profile with facebook, friendfeed, twitter, plurk, etc. - (Read more)

Social bookmarks. - (Read more)

Share real-time news with your group. Strengthen relationships with your customers. Increase exposure for your website. - (Read more)

Social bookmarking, store and share lists of your favorite sites. - (Read more)

Social bookmarking, blogging and syndication for news, videos and podcasting. Founded by Kevin Rose in 2004. - (Read more)

Social networking based on companies, regions, schools and more. Register for a free profile to make new friends, stay in touch with old friends or network with colleagues. - (Read more)

Social bookmarking and tagging including weird news link submissions. - (Read more)

Social bookmarking. Users can tag links or add their own for private lists or public sharing. Owned by LookSmart. - (Read more)

Social bookmarking. Vote on existing links or submit your own. Free account registration. - (Read more)

Find out how your site (or any site) ranks on the social meter. The meter returns a list of links on Bloglines, Delicious, Google, Rojo, Shadows, Technorati and Yahoo. It's definitely fun. - (Read more)

Allows users to create streaming media on their own for free. Sign up, create a channel and then use that channel content across your web site, blog or social media profile. - (Read more)

Social tagging and favorites including site reviews, community profiles and more. - (Read more)