"The world's largest social music platform. Show off your taste, see what your friends are listening to, hear new music, get personal radio, recommendations, and downloads, all for free."

"Leverage Software is the leader in enterprise-class social networking and online community solutions, powering communities for more than 150 companies in the technology, media, consumer and services industries. ...

"LibraryThing is an online service to help people catalog their books easily. You can access your catalog from anywhere—even on your mobile phone. Because everyone catalogs together, LibraryThing also connec ...

"Let readers search your blog, bookmarks, blogroll and more...all from one little box."

"Lijit is working on a revolutionary way to refine the search experience. Using the power of people, conne ...

"LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections to recommended job candidates, industry experts and business part ...

"LiveJournal lets you express yourself, share your life, and connect with friends online.

You can use LiveJournal in many different ways: as a private journal, a blog, a discussion forum, a social network ...

"LiveMansion.com is an online social networking community with a focus on entertainment and popular culture. At the forefront of the convergence of social networking and entertainment, LiveMansion is defining &q ...

"The Home for Open Media. Come check out our vlogs, videos, mashups, tunes, clips, podcasts, vidcasts and shorts. Upload and share. Watch and rate. Get played, get paid."