openmaktaba.com
OpenMaktaba helps search books, ebooks, papers, library records, or reading archives.
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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.
optery.com
Finds exposed profiles on people-search and data-broker sites, with free exposure reports and paid recurring removal options.
organic-chemistry.org
Searchable repository for finding chemistry datasets and datasets.
orionsarm.com
OrionsArm helps search books, ebooks, papers, library records, or reading archives.
ortolang.fr
Search humanities data collections and supporting dataset from FRA.
osaka-aoyama.repo.nii.ac.jp
Search an online collection of books, documents, media and archival records.
lib.osaka-kyoiku.ac.jp
Search an online collection of books, documents, media and archival records.
ir.library.osaka-u.ac.jp
Search an online collection of books, documents, media and archival records.
OSINTMe guide listing public sex offender registries and related search resources by country.
otemae.repo.nii.ac.jp
Search an online collection of books, documents, media and archival records.
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.
opendata.ps
Search and download open datasets published for Palestine.
datosabiertos.gob.pa
Find published open datasets through filters, categories and keyword search.
pandora.nla.gov.au
Pandora helps search books, ebooks, papers, library records, or reading archives.
panjabdigilib.org
Panjab Digital Library helps search books, ebooks, papers, library records, or reading archives.