• Open data by location (5 P)

C

• Creative Commons-licensed databases (1 C, 19 P)

D

• Datasets in machine learning (1 C, 14 P)

E

• E-democracy (32 P)

G

• Government services web portals in the United States (39 P)

O

• Open data portals (1 C, 8 P)
• Open government (6 C, 39 P)
• OpenStreetMap (2 C, 28 P)

P

• Public domain databases (20 P)

W

• Wikidata (17 P)

• Open data

0–9

• 2025 United States government online resource removals

A

• Academic Torrents
• Airbyte
• AllTrials
• American Art Collaborative
• Art & Architecture Thesaurus

B

• ‡biblios.net
• Irina Bolychevsky
• Bus Open Data Service
• Bustimes.org

C

• CKAN
• Concepticon
• Coronavirus Tech Handbook
• Covid Act Now
• COVID Moonshot
• Mercè Crosas

D

• Data collaboratives
• Data Commons
• Data sharing
• Data.gov
• Data.gov.in
• Data.gov.uk
• Dataverse
• DataViva
• DBpedia
• Declarator (website)

E

• Economics of open data
• EmissionML
• EU Open Data Portal
• European Data Portal
• European Genome-phenome Archive

F

• FactGrid
• FAIR data
• Fichier des personnes décédées
• Figshare
• Financial Instrument Global Identifier

G

• GDELT Project
• Ghana Open Data Initiative
• GigaDB
• Global Research Identifier Database
• Global Urban Evolution Project
• GovHack
• GTFS

H

• Health Data Consortium
• Hypothes.is

I

• International Open Data Charter
• International Open Data Day

J

• Journal Article Tag Suite

L

• Library linked data
• Licence Ouverte
• Linguistic Linked Open Data
• Linked data

O

• Open by default
• Open Contracting Data Standard
• Open Data Buffalo
• Open Data Institute
• Open Data Now
• Open Data Partnership
• Open Database License
• The Open Definition
• Open Energy Modelling Initiative
• Open energy system databases
• Open energy system models
• Open government
• Open Government Initiative
• Open Notebook Science Challenge
• Open scientific data
• Open Source Geospatial Foundation
• Open-notebook science
• Open-source governance
• Open.data.gov.sa
• OpenCorporates
• OpenEI
• OpenFDA
• Overture Maps Foundation

P

• Public data
• Public.Resource.Org
• PubRef.org

R

• Ramani Huria
• Real Time Information Group
• Research Organization Registry

S

• Safecast
• SpotCrime.com
• Suggested Upper Merged Ontology

T

• Tatoeba
• Toronto Open Data

U

• UNdata
• Unique Property Reference Number

V

• Virtual USA

W

• Wikidata
• Wind Energy Data & Information Gateway
• WordNet
• World Data Center

X

• X-Road

Y

• YODA Project

Z

• Deborah Zarin
• Zenodo