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Best crowdsourced projects of 2021

A ranking of community-built projects and databases.

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Software(crowdsourced project, navigation system, online dating service, open content project, open source software, virtual map)

Web service(free web service, open source web service)

email web service(free email web service)

mapping web service(online map)

travel web service

video on demand service

web analytics tools

web search engine

website(blogging platform, business social-networking website, crowdfunding website, discussion website, entertainment website, image-sharing website, news website, online dating website, social networking website, torrent website, video-sharing website)

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See also the lists:

List of crowdsourced projects

Most popular crowdsourced projects

Oldest crowdsourced projects

Newest crowdsourced projects

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Crowdsourced projects (active now)

Crowdsourced projects of 2024

Crowdsourced projects of 2023

Crowdsourced projects of 2022

Crowdsourced projects of 2021

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