---
title: "List of crowdsourcing projects"
chunk: 6/9
source: "https://en.wikipedia.org/wiki/List_of_crowdsourcing_projects"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:14:12.164558+00:00"
instance: "kb-cron"
---

== M ==
Mapillary is a service for sharing geotagged photos developed by Mapillary AB with the aim to represent not only streets but the whole world. All photos and data are shared using a Creative Commons license, most of the internal software is available under the MIT license and the full API is public.
MateCat is a web-based computer-assisted translation (CAT) tool released as open source software under the Lesser General Public License (LGPL) from the Free Software Foundation.
McMaster Postcard Project is a platform created by the William Ready Division of Archives and Research Collections at the McMaster University Library for crowdsourcing information about an archival collection of historical postcards, providing information on the card's country, province and city of origin, date, and other pertinent information in a "notes" section. Cards were previously categorized only by province, or by country for international cards.
Microtask is a company that has developed a software platform for global distribution of short-duration tasks to online workers. The system supports automated quality assurance and provides service-level agreements for task quality and turnaround times.
The Milky Way Project is a project that aims to identify bubbles in the Milky Way with users analyzing infrared images from the Spitzer Space Telescope.
Mindpixel was an online artificial intelligence project to build a knowledgebase of true/false statements, and ran from 2000 to 2005.
Moovit is a transit app and platform which makes use of the crowd in two ways: first by letting community editors add and edit transit data (in locales where official data is not openly available), and second by letting app users report bus tardiness, crowdedness, etc. to other riders down the line in a similar fashion to Waze.
Moral Machine is an online platform that generates moral dilemmas and collects information on the decisions that people think an autonomous vehicle should make between two death outcomes.
Mozilla Common Voice is a project to help make voice recognition open to everyone. Volunteers can add and verify voice recordings. The database with recordings is available as open source.

== N ==
Netflix Prize was an open competition for the best collaborative filtering algorithm that predicts user ratings for films, based on previous ratings. The competition was held by Netflix, an online DVD-rental service, and was completed in September 2009. The grand prize of $1,000,000 was reserved for the entry which bettered Netflix's own algorithm for predicting ratings by 10%. Netflix provided a training data set of over 100 million ratings that more than 480,000 users gave to nearly 18,000 movies, which is one of the largest real-life data sets available for research. The related forum maintained by Netflix has seen lively discussions and contributed a lot to the success of this competition. A very relevant fact to the power of crowdsourcing is that among the top teams are not only academic researchers, but laymen with no prior exposure to collaborative filtering (virtually learning the problem space from scratch).
NotchUp is a company founded in 2008 offering crowdsourced job recruiting to find those who may passively be interested in new opportunities.
Numbeo – worldwide studies based on reported consumer prices, perceived crime rates, quality of healthcare and other statistics. As of January 2020, 5,863,289 prices in 9,300 cities entered by 500,170 contributors.

== O ==

Old Weather is a web-based effort to transcribe weather observations made by Royal Navy ships around the time of World War I. These transcriptions will contribute to climate model projections and improve a database of weather extremes and will be of use to historians in tracking past ship movements and the stories of the people on board.
Online Biographical Dictionary of the Woman Suffrage Movement in the United States offers 3,700 volunteer-written biographies of suffragists.
Online volunteering service (United Nations) is a free service that connects grassroots organizations, international NGOs, local governments, educational institutions and United Nations agencies with thousands of individuals ready to volunteer via the Internet to help address development challenges. The service was launched in 2000 and it quickly attracted thousands of people ready to volunteer online. In 2014 alone, UN Online Volunteers undertook 16,134 assignments.
Open Food Facts gathers information and data on food products from around the world.
OpenHistoricalMap is a historical map of the world using OpenStreetMap technology and processes.
OpenSeaMap is a free nautical chart covering seas, lakes, inland waterways and rivers for the needs of sailors, divers, fishermen and canoeists. The data is collected by crowdsourcing. In a new project OpenSeaMap collect shallow water depths worldwide for making bathimetric charts.
OpenSignal is a project to independently map cell phone carrier coverage and performance. All data is collected from a smartphone application that has been downloaded over 3.5m times worldwide.
OpenStreetMap is a free editable map of the world, which has over 100,000 signed up contributors in mid-2009. Creation and maintenance of geospatial data is a labor-intensive task which is expensive using traditional approaches, and crowdsourcing is also being used by commercial companies in this area including Google and TomTom.
Oxfam Novib (Netherlands) mid-2008 launched a crowdsourcing initiative named Doeners.net, meant for people to support the organization's campaigning activities.