“The big social networking sites like Facebook, Twitter, and
LinkedIn all us open source software to power their services. Eric
Geier rounds up a batch of open source social networking projects
that you can deploy in your own organization, plus one open source
social networking aggregator.“Social networking sites like Facebook, Twitter, MySpace, and
LinkedIn have taken off. They are now among the top sites visited
among the entire World Wide Web. As you might have guessed, the
open source community has some involvement in the social networking
space.“There are basically two types of applications when it comes to
social networking. On the user side, there are aggregator
applications that gives users access to multiple sites from one
application. Then there are applications that serve as development
platforms for creating social networking sites.“Here is a list of 6 open source projects: one aggregator and
five development platforms:”