MySpace is a social networking website with an interactive, user-submitted network of friends, personal profiles, blogs, groups, photos, music, and videos for teenagers and adults internationally.
Ning competes with large social sites like MySpace and Facebook by appealing to people who want to create their own social networks around specific interests with their own visual design, choice of features and member data. The unique feature of Ning is that anyone can create their own social network for a particular topic or need, catering to specific membership bases.
Meebo is a new communications and media company that's re-writing the way people have conversations and communicate on the Web. We provide instant messaging and group chat to over 40 million people at meebo.com and via partner sites across the Web.
Groupsite ties together social networking and collaboration in an effort to make group communications easier and more efficient. It's a hosted solution with Pro plans and a free tier for social networks. With the free account, you can add individual premium features at $9/month each.
Groupsite has all of the features you would expect to find, including forums, calendars, blogs, file sharing, and profiles. Some have said that Groupsite is to Ning what Facebook is to Myspace. Check out our coverage here and go take it for a spin yourself.