Facebook
Free
Facebook is the world's largest social network platform.
Diaspora
Open Source
Diaspora is a nonprofit, user-owned, distributed social network that is based upon the free Diaspora software.
HumHub
Open Source
HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.
Libertree
Open Source
Libertree is a free, libre, open-source software that lets people create their own social network.
Jostle
Commercial
Jostle is a people engagement platform mainly focused on employee engagement.
ZeroMe
Open Source
ZeroMe is a social networking platform.
Tumblr
Free
Tumblr is a microblogging and social networking website.
BuddyPress
Open Source
BuddyPress inherits and extends upon the integral functional elements of the WordPress engine including themes, plugins, and widgets.
Gnu Social
Open Source
GNU social is a continuation of the StatusNet project. It is social communication software for both public and private communications.
Yammer
Commercial
Yammer is a freemium enterprise social networking service used for private communication within organizations.
kune
Open Source
kune is a distributed social network software.
