opencity.in
Research data portal for exploring humanities and social records, including datasets.
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opencorporates.com
Open corporate database for searching companies, officers, filings, and corporate relationships worldwide.
opendata.fr.ch
Open-data catalog covering Canton Fribourg, Switzerland, with filters and downloadable records.
vd.ch
Open-data catalog covering Canton Vaud, Switzerland, with filters and downloadable records.
v2.sherpa.ac.uk
OpenDOAR helps search books, ebooks, papers, library records, or reading archives.
open.bccampus.ca
OpenED helps search books, ebooks, papers, library records, or reading archives.
openedition.org
OpenEdition helps search books, ebooks, papers, library records, or reading archives.
openei.org
Research data portal for exploring engineering records, including recorded data.
openheritage3d.org
Research data portal for exploring ancient cultures records, including datasets.
data.indy.gov
Browse public datasets, metadata and downloadable records in an open catalog.
openmaktaba.com
OpenMaktaba helps search books, ebooks, papers, library records, or reading archives.
openmd.com
OpenMD helps search books, ebooks, papers, library records, or reading archives.
openpaper.work
Document management tool for scanning, organizing, and searching paperless records.
openstax.org
Openstax helps search books, ebooks, papers, library records, or reading archives.
philschatz.com
OpenStax College Textbooks helps search books, ebooks, papers, library records, or reading archives.
opentrials.net
Find data collections, study records and related research documentation.
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.
orcabook.com
Find scholarly literature and bibliographic records using structured search fields.
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.
orionsarm.com
OrionsArm helps search books, ebooks, papers, library records, or reading archives.
orthomcl.org
Research data portal for exploring basic in biology and medicine records, including datasets.
orto.website
Vehicle lookup site for checking license plates, car data, and public vehicle-related records.