A curated list of high-quality open data resources, tools, platforms, and projects across domains.

Open data enables transparency, innovation, and collaboration across science, governance, journalism, and more. This list is intended for developers, researchers, civic technologists, and data enthusiasts.

• General Open Data Portals
• Government Open Data
• Science & Research Data
• Geospatial & Mapping Data
• Healthcare & Medical Data
• Financial & Economic Data
• Environment & Climate Data
• Company & Corporate Data
• Civic & Political Data
• Tools & Libraries
• Related Awesome Lists

• Data.gov – U.S. federal government’s open data portal.
• European Data Portal – Aggregated public data from European countries.
• World Bank Open Data – Global development data and indicators.
• UNdata – United Nations’ statistical databases.
• Kaggle Datasets – Collection of curated datasets across domains.
• Google Dataset Search – A search engine for datasets.

• UK Data Service – Social and economic data for the UK.
• Canada Open Data – Open datasets from the Government of Canada.
• India Open Government Data – Government of India open data portal.
• Open State Foundation – Projects to unlock government data in the Netherlands.
• OpenAIRE – EU-based open access research and public data platform.

• Figshare – Repository for research outputs and datasets.
• Zenodo – Open-access research sharing platform developed by CERN.
• Dryad – Curated, general-purpose repository for research data.
• PLOS Data Repository – Promotes open data in science publishing.

• OpenStreetMap – Collaborative map of the world.
• Natural Earth – Public domain map dataset of the world.
• USGS Earth Explorer – Satellite imagery and geospatial data from the U.S. Geological Survey.
• NASA Earthdata – Earth science data from NASA.

• CDC Data & Statistics – U.S. Centers for Disease Control public data.
• HealthData.gov – U.S. healthcare datasets.
• OpenNeuro – Public data for neuroscience research.
• Global Health Observatory (WHO) – World Health Organization's open health data.

• OECD Data – Economic indicators from the OECD.
• IMF Data – Global macroeconomic data from the International Monetary Fund.
• FRED – Economic research data from the U.S. Federal Reserve.
• Quandl – Open and premium financial, economic, and alternative data.

• NOAA Climate Data – U.S. National Oceanic and Atmospheric Administration.
• NASA Climate Data – Climate and atmospheric data from NASA.
• Copernicus Open Access Hub – Sentinel satellite data from the European Space Agency.
• Global Forest Watch – Deforestation and forest monitoring data.

• OpenCorporates – The largest open database of companies in the world.
• SEC EDGAR Database – U.S. corporate financial filings.
• Companies House (UK) – UK company registration and filings.

• EveryPolitician – Data on national politicians in every country.
• Open States – U.S. state-level legislation and lawmaker tracking.
• Election Data Archive – Open data on elections and voting behavior.
• ParlTrack – European Parliament legislative data tracker.

• CKAN – Powerful open-source data management system.
• Frictionless Data – Standards and tools for working with open data.
• DataHub – Platform for publishing and sharing datasets.
• OpenRefine – A powerful tool for cleaning and transforming messy data.

• Awesome Open Science – Tools and communities for open scientific collaboration.
• Awesome Open Governance – Transparency, civic tech, and open public policy tools.
• Awesome Civic Tech – Platforms and communities using tech for civic engagement.
• Awesome Political Science – Political datasets, theory, and analysis.
• Awesome Journalism – Resources for investigative and data journalism.

Contributions are welcome!