¹ See also http://googleblog.blogspot.de/2009/09/announcing-project-10100-ideathemes.html.

2 See also https://www.techdirt.com/blog/innovation/articles/20120409/03412518422/why-netflix-never-implemented-algorithm-that-won-netflix-1-millionshtml.

³ http://crowdflower.com/

⁴ http://dailycrowdsource.com/

⁵ https://www.mturk.com/

⁶ http://figshare.com/

⁷ www.researchgate.net/

⁸ www.mendeley.com

/ ⁹ http://www.taverna.org.uk/

¹⁰ https://www.historypin.org/

¹¹ https://www.zooniverse.org/

¹² http://www.innocentive.com/

¹³ https://www.kaggle.com/

¹⁴ http://polymathprojects.org/

¹⁵ http://www.pgdp.net/c/

¹⁶ https://www.duolingo.com/