v2.sherpa.ac.uk
OpenDOAR helps search books, ebooks, papers, library records, or reading archives.
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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.
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.
register.openownership.org
OpenOwnership helps research websites, public data, search results, or online communities.
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.
orionsarm.com
OrionsArm helps search books, ebooks, papers, library records, or reading archives.
ortolang.fr
Search humanities data collections and supporting dataset from FRA.
ir.library.osaka-u.ac.jp
Search an online collection of books, documents, media and archival records.
github.com
OSINT BIBLE is an open source search or OSINT resource for finding information across public web sources.
osintcombine.com
OSINT Combine is an OSINT resource for online investigations, research links, search methods, and public data tools.
osintdojo.com
OSINT Dojo is an OSINT resource for online investigations, research links, search methods, and public data tools.
osintessentials.com
Curated OSINT toolkit with links for people search, social media, maps, domains, and research.
OSINTMe guide listing public sex offender registries and related search resources by country.
kilaz.net
OSINT Tool Explorer is an OSINT resource for online investigations, research links, search methods, and public data tools.
osintracker.com
Osintracker is an OSINT resource for online investigations, research links, search methods, and public data tools.
ouverte.ottawa.ca
Search a government or civic data catalog for reusable public information.
otzarhasefer.com
Research index for locating articles, books, authors and citation information.
ownersman.com
Ownersman.com helps search books, ebooks, papers, library records, or reading archives.
oyez.org
Oyez helps search books, ebooks, papers, library records, or reading archives.
b2.caspio.com
Caspio database for searching Pennsylvania forfeiture records from 2010 through 2016.
pagebypagebooks.com
Page by Page Books helps search books, ebooks, papers, library records, or reading archives.