Eight Crowdfunding Sites For Social Entrepreneurs

Forbes has just published a list of eight Crowdfunding Sites for Social Entrepreneurs.  Most sites on the list are available only to charities registered in the US.

See the Forbes list here:
http://www.forbes.com/sites/devinthorpe/2012/09/10/eight-crowdfunding-sites-for-social-entrepreneurs/

It would be interesting to complement this list with European alternatives. So please let me know what you come up with. Any suggestions will be posted here.