OpenStreetMap

Open Plaques

Wikipedia

Panoramax

beaconDB

OpenCelliD

iNaturalist

eBird

Mushroom Observer

adsb.fi

The Open Glider Network

OpenAerialMap

Mozilla Common Voice

Lingua Libre

Open Food Facts

Meshtastic

MeshCore

Reticulum

TinyGS

SatNGOS

Encyclopedia of Life

Wikispecies

Wikidata

Wikimedia Commons

Wikiquote

Wiktionary

Wikivoyage

Wikisource

Wikiversity

Tor

I2P

Archive Team

openSenseMap

Safecast

radmon.org

Blitzortung.org

Sensor.Community

Noise-Planet

SondeHub

xeno-canto

Freesound

LibriVox

RailwayStations

Zooniverse

SciStarter

CitSci

Cochrane Crowd

Transcribe Bentham

GLOBE Program

Aurorasaurus

Foldit

Observation.org

Phylo

EteRNA

Globe at Night

Wild Me

HerpMapper

Smithsonian Transcription Center

eButterfly

Pl@ntNet

Mosquito Alert

Spritacular

OpenHistoricalMap

FactGrid

OpenSeaMap

IHO Data Centre for Digital Bathymetry

Distributed Proofreaders

Mutopia Project

International Music Score Library Project

Choral Public Domain Library

MusicBrainz

OpenTopography

Asteroids@home

BOINC Central

Climateprediction.net

Einstein@Home

GPUGrid.net

LHC@Home

LODA

Milkyway@Home

NFS@Home

NumberFields@home

PrimeGrid

RNA World

Rosetta@home

World Community Grid

yoyo@home

Folding@home

Great Internet Mersenne Prime Search

Web

Android

iOS

GNU/Linux

Windows

macOS

ESP32

nRF52

Personal computer

Smartphone

Server

SDR

Weather station

LoRa

Camera

Microphone

UAV

Geiger counter

Air quality monitor

Lighting detector

Noise sensor

Echo sounder

Lidar