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openei.org
Research data portal for exploring engineering records, including recorded data.
openheritage3d.org
Research data portal for exploring ancient cultures records, including datasets.
openicpsr.org
Find and access economic policy, applied economics research data, with indexed dataset.
openlandmap.org
Searchable repository for finding geography datasets and datasets.
openmlol.it
Browse digitized texts, images, archives and cataloged cultural materials.
openneuro.org
Find and access basic in biology and medicine research data, with indexed image.
register.openownership.org
OpenOwnership helps research websites, public data, search results, or online communities.
opensanctions.org
OpenSanctions database for searching sanctions, politically exposed persons, and watchlist data.
openstreetmap.org
OpenStreetMap is a collaborative world map built from open geographic data contributed by users.
opentopography.org
Browse research datasets and geospatial data related to geography.
opentrials.net
Find data collections, study records and related research documentation.
openvan.camp
Multilingual vanlife and motorhome news aggregator.
openverse.org
Search openly licensed images and audio from cultural, educational and media collections.
openworm.org
Searchable repository for finding basic in biology and medicine datasets and moving image.
catalog.opgc.uca.fr
Research data portal for exploring atmospheric records, including datasets.
actrec.gov.in
Research data portal for exploring basic in biology and medicine records, including datasets.
Research data portal for exploring biology records, including experimental data.
ordar.otelo.univ-lorraine.fr
Research data portal for exploring analytical chemistry records, including datasets.
data.oregon.gov
Browse government and civic datasets for Oregon, United States.
organic-chemistry.org
Searchable repository for finding chemistry datasets and datasets.
ortholugedb.ca
Searchable repository for finding basic in biology and medicine datasets and datasets.
orthomcl.org
Research data portal for exploring basic in biology and medicine records, including datasets.
ortolang.fr
Search humanities data collections and supporting dataset from FRA.