Crowdsourcing Sites

Croudsourcing.org
http://www.crowdsourcing.org/

Amazon Mechanical Turk
https://requester.mturk.com/

Quora
http://www.quora.com/about

Idea Bounty
http://www.ideabounty.com/

Scitable
http://www.nature.com/scitable

One Billion Minds
http://www.onebillionminds.com/

PsychExperiment.net
http://www.psychexperiment.net/

Transcribing Jeremy Bentham
http://www.ucl.ac.uk/transcribe-bentham/

Quadrant of Euphoria
http://mmnet.iis.sinica.edu.tw/proj/qoe/

All Our Ideas
http://www.allourideas.org/