adamrice / #socialsoftware

https://karrot.world/#/welcome

Online community for real-world communities to organize

https://bonfirenetworks.org/

Community-managed, self-hosted, modular social network.

http://elgg.org/

Social-networking CMS

http://www.metafilter.com/contribute/socialexplorer.mefi

http://www.bookcrossing.com/

Social networking for your books

http://www.neighbornode.net/

A way for connecting physical neighbors over wifi

http://www.flickrdate.com/

Find dates using flickr tags. This is the McGuyver approach to the semantic web

http://www.ning.com/

Social software toolkit

http://www.last.fm/

Freakin' awesome. Listen to music that's similar to your known tastes, or your friends' tastes, or...