Facebook
Free
Facebook is the world's largest social network platform.
Minds
Open Source
Minds is an open source social networking service.
Ello
Free
Ello is a community to discover, discuss, publish, share and promote the things you are passionate about.
ZeroMe
Open Source
ZeroMe is a social networking platform.
Diaspora
Open Source
Diaspora is a nonprofit, user-owned, distributed social network that is based upon the free Diaspora software.
Known
Freemium
Known is a publishing platform that allows its users to share their stories online.
Soup.io
Free
Soup.io is an Austrian social networking and microblogging site.
Plurk
Free
Plurk is a free social networking and micro-blogging service.