citizen science – Scientific research conducted, in whole or in part, by amateur or nonprofessional scientists

Collaborative mapping – Aggregation of web mapping and user content

Collective consciousness – Shared beliefs and ideas in society

Collective intelligence – Group intelligence that emerges from collective efforts

Commons-based peer production – Method of producing value

Distributed Proofreaders – Web-based proofreading project

Flash mob – Form of assembling humans

Gamification – The use of game thinking and game mechanics in non-game contexts to engage users in solving problems

List of crowdsourcing projects – Wikimedia list article

Microcredit – Cheap credit (banks which charge loans at low rate of interest)

Participatory democracy – Model of democracy

Smart mob – Digital-communication coordinated group

Stone Soup – European folk story

Virtual volunteering – volunteering conducted at least partially via the internet

Wisdom of the crowd – Collective perception of a group of people

image crowdsourcing

define crowdsourcing

wikipedia crowdsourcing

weblio crowdsourcing

kotobank crowdsourcing

jisho crowdsourcing