List of citizen science infrastructures

This page includes a list of citizen science infrastructures, for example some kind of central service or web sites that centralize in an organized way a number of related citizen science projects.

Infrastructure	Number of projects	Number of users	Access
Amazon mechanical turk			https://www.mturk.com/
BOINC	50	234,998	http://boinc.berkeley.edu/
Citizen Sort	3		http://www.citizensort.org/web.php/aboutus/biologicalscience
Cornell Lab citizen science technology	8	200,000	http://birds.cornell.edu/page.aspx?pid=1664#citsciThemeHighlights=2
Crowdcrafting	125	5,208	http://crowdcrafting.org/
EpiCollect			http://www.epicollect.net/
Everyaware			http://cs.everyaware.eu/
ExCiteS			http://www.ucl.ac.uk/excites
Experimental tribe	12		http://www.xtribe.eu/
Infrastructure test	15	12
OPAL			http://www.opalexplorenature.org/
Public Lab			http://publiclab.org/
Scistarter			http://scistarter.com/
Testing Sandbox	12		http://www.xtribe.eu/
Zooniverse	46	855,018	http://www.zooniverse.org/

Uncompleted page:

Amazon mechanical turk, Apache OpenNLP, BOINC, CS4CS, Citizen Sort, Cornell Lab citizen science technology, Crowdcrafting, DataMelt, Einstein@home, EpiCollect, Everyaware, Evolution MegaLab, ExCiteS, Experimental tribe, EyeWire, Fold It, IBM Many Eyes v2, Infrastructure test, KH Coder, OPAL, Orange, Planet Hunters, Plankton Portal, Public Lab, Pybossa, SNAPP, Scistarter, Tabula, Testing Sandbox, The Milky Way Project, Tm, Tropes, Voyant Tools, Worm Watch Lab

Completed page

Citizen science project test, JSON-CSV Converter, SQ-ALL, Zooniverse