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multicians.org favicon

Discover the story of the Multics OS

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Explore the history, features, and impact of the Multics operating system through stories, technical documents, and memorabilia on this archive site.

napoleon-series.org favicon

Discover in-depth Napoleonic Wars history resources

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Explore a vast archive on the Napoleonic Wars with articles, biographies, battle details, maps, and resources for history enthusiasts and researchers.

runeberg.org favicon

Explore Nordic classics and encyclopedias online

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Project Runeberg offers free access to Nordic literature and reference works, making classic books and encyclopedias available online for everyone.

collections.ushmm.org favicon

Explore 270,000+ Holocaust-era records online

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Search the United States Holocaust Memorial Museum's digital collections of artifacts, documents, and stories about Holocaust victims, survivors, and history.

oldbaileyonline.org favicon

Explore real Old Bailey court records online

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Search and explore historical records from London's Old Bailey court cases, 1674-1913, in this extensive online archive and digital library.

annas-archive.org favicon

Find and download millions of academic papers free

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Access millions of academic papers, books, and articles for free with Anna’s Archive, the world’s largest open-source digital library and archive.

saltriverstories.org favicon

Explore local history through interactive stories

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Discover the history, culture, and communities of the Phoenix-Scottsdale-Tempe area with engaging stories, tours, and maps on Salt River Stories.

eo.wikipedia.org favicon

Explore and edit the Esperanto encyclopedia

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Vikipedio is the Esperanto-language Wikipedia, offering a free, collaborative encyclopedia with over 370,000 articles for readers and contributors.

wikidata.org favicon

Explore and edit a global knowledge database

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Wikidata is a free, collaborative knowledge base with millions of data items that anyone can view, edit, and use for research or projects.

simple.wikipedia.org favicon

Understand topics with simple, clear articles

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Simple Wikipedia offers clear, easy-to-read encyclopedia articles on a wide range of topics, making knowledge accessible for all ages and English learners.

dejure.org favicon

Search German laws and court rulings easily

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Find German and European laws, legal texts, and court decisions with easy search and references. All content is in German for legal research and guidance.

dictionary.apa.org favicon

Find trusted psychology definitions instantly

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Browse over 25,000 clear, expert-reviewed psychology terms and definitions in this trusted online dictionary from the American Psychological Association.

worldwidewords.org favicon

Discover the stories behind English words

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Explore the history, origins, and quirks of English words with thousands of pages on word meanings, usage, and language evolution.

wehewehe.org favicon

Search and explore Hawaiian language meanings

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Nā Puke Wehewehe ʻŌlelo Hawaiʻi is an online Hawaiian language dictionary and resource for translating and exploring Hawaiian words and meanings.

famousscientists.org favicon

Discover stories of history’s greatest scientists

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Explore biographies, achievements, and facts about famous scientists and inventors from around the world in this easy-to-use online resource.

livius.org favicon

Discover detailed articles on ancient history

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nuclearweaponarchive.org favicon

Comprehensive nuclear weapons facts and data

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Explore detailed information, technical data, and FAQs about nuclear weapons worldwide, including current arsenals and historical context.

thelawdictionary.org favicon

Find legal definitions quickly and easily

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Look up legal terms and definitions for free with this online law dictionary, featuring Black’s Law Dictionary and helpful legal resources for business.

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Find New Zealand legal cases and legislation free

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Access New Zealand legal cases, legislation, and journals for free. NZLII makes it easy to find and read legal information online without barriers.

glottolog.org favicon

Discover info on thousands of world languages

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Explore detailed reference information on the world's languages, with a special focus on lesser-known languages and linguistic families.

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trove.nla.gov.au favicon

Discover Australia’s history, news, and archives free

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Explore Australia’s history, newspapers, photos, and more with Trove—a free digital library and research portal from the National Library of Australia.

theclio.com favicon

Explore history and culture near you

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Clio helps you discover history and culture near you with entries, walking tours, and virtual museum experiences from organizations across the country.

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springer.com favicon

Explore expert economics definitions and concepts

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Access The New Palgrave Dictionary of Economics online, featuring expert-written, regularly updated entries on economics for students and professionals.

etymonline.com favicon

Explore the roots of English words instantly

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Discover the origins and histories of English words, phrases, and idioms with this easy-to-use online etymology dictionary and language resource.

acronymfinder.com favicon

Instantly find what any acronym means

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Look up the meaning of any acronym or abbreviation. Acronym Finder offers a huge, easy-to-search database for quick answers to what terms stand for.

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Look up any file format or extension instantly

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Explore file formats, extensions, Unicode characters, and standards with FileFormat.Info—your online resource for file info and conversions.

idioms.thefreedictionary.com favicon

Explore 60,000+ English idioms and phrases

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Browse a huge collection of English idioms and phrases with clear meanings and examples. Great for understanding everyday expressions in English.

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Compare 33 Catholic Bible versions online

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Explore the Catholic Bible online with 33 versions in multiple languages, advanced search, text comparison, and a handy biblical dictionary. (Portuguese)

medical-dictionary.thefreedictionary.com favicon

Find clear definitions for 45,000+ medical terms

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Look up medical terms, medications, and procedures with this easy-to-use online medical dictionary featuring over 45,000 definitions and clear explanations.

historyofinformation.com favicon

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legal-dictionary.thefreedictionary.com favicon

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Look up clear, easy-to-understand definitions and explanations for thousands of legal terms, cases, and concepts related to United States law.

barrypopik.com favicon

Discover the stories behind American words

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Explore the origins and meanings of American words, names, and phrases with this etymological dictionary, featuring regional terms and 39,000+ entries.

mathshistory.st-andrews.ac.uk favicon

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pediaa.com favicon

Learn the difference between anything quickly

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unabridged.merriam-webster.com favicon

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wordinfo.info favicon

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dictionary.law.com favicon

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dwds.de favicon

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znanje.hr favicon

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dexonline.ro favicon

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sunnah.com favicon

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statoids.com favicon

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jlogos.com favicon

Search 50 dictionaries at once for free

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JLogos is a free Japanese website that lets you search across 50 different dictionaries and reference sources all in one place.

mathwords.com favicon

Quickly look up math terms and formulas

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Browse math terms, formulas, and diagrams from algebra to calculus. Mathwords helps you easily understand key math concepts and definitions online.

ikonet.com favicon

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Explore visual encyclopedias, interactive games, and educational tools to learn about the world through images and engaging content. Available in multiple languages.

history.howstuffworks.com favicon

Discover pivotal moments in world history

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Explore world history with easy-to-read articles on major events, people, and myths, all in one place on HowStuffWorks History.

workhouses.org.uk favicon

Discover the history of British workhouses

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Explore detailed history and stories of British workhouses, including locations, people, and social impact, curated by Peter Higginbotham.

library.municode.com favicon

Search thousands of city and county codes online

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Municode Library lets you easily search and view over 3,300 municipal codes and ordinances from cities and counties across the United States.

theodora.com favicon

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Browse job titles, country info, and reference tools with ITA. Explore occupations, stats, and dictionaries all in one easy-to-navigate resource site.

geonames.de favicon

Browse country and language info worldwide

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Explore global country and language facts, codes, and stats in one place. Find detailed information about nations, regions, and their official languages.