Best Open Data tools

Build coordinate-based weather requests from current conditions and selectable hourly or daily forecast variables.

An API for looking up and contributing ingredient, nutrition, and product details by barcode or search.

Searchable climate law, policy and finance data

A catalogue of United States government data

Open download statistics through a podcast prefix

Marine biodiversity data and documentation

Research-oriented Internet measurements with public result data

San Diego datasets with department and tag browsing

Lyon's metropolitan data catalogue and reuse guidance

Discovery of satellite and other Earth-observation data

Ontario public datasets by ministry and subject

French geographic-data discovery

Food composition data with documented data types

Open scholarly citation and bibliographic data

Education, science and culture statistics

Public-domain small-scale map data

Amsterdam's municipal data gateway

Rennes datasets with mapping and reuse resources

Bordeaux datasets on public decisions and local services

Ocean-activity data and mapping resources

US water observations and data-access resources

US outdoor air-quality measurements and downloads

Social-science data with several access levels

Swedish statistical releases and data resources