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Encyclopedia

encyclopedia.com

Encyclopedia.com is a free online encyclopedia and reference resource. It aggregates reference entries from more than 200 trusted published sources, including Oxford University Press and Columbia Encyclopedia. The platform offers access to nearly 200,000 citeable reference entries and over 50,000 topic summaries accompanied by pictures, videos, and related newspaper and magazine articles. Users can search content via keyword or alphabet browse, and rate and sort reference entries. It is used by universities and institutions for research and provides homework help.

Encyclopedia Mythica

pantheon.org

Encyclopedia Mythica is an internet encyclopedia on mythology, folklore and religion, stating it has been online since 1995. It offers search across its articles and sections covering regions including the Americas, Asia, Europe, the Middle East and Oceania, with popular areas such as Greek, Roman, Norse, Arthurian and Māori mythology.

Encyclopedia Of Buddhism

archive.org

Encyclopedia Of Buddhism helps search books, ebooks, papers, library records, or reading archives.

Stanford Encyclopedia of Philosophy

plato.stanford.edu

The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work. It offers a table of contents, archives and random entry browsing, with editorial information and citation guidance.

Encyclopedia Astronautica

astronautix.com

Encyclopedia Astronautica is a space history resource covering rockets, spacecraft, launch vehicles, astronauts, cosmonauts, spaceflights, engines and space exploration. The site provides an alphabetical index and space history chronology and calendar pages.

Encyclopedia Of Hinduism

archive.org

Encyclopedia Of Hinduism helps search books, ebooks, papers, library records, or reading archives.

List of Encyclopedias

wikipedia.org

List of Encyclopedias helps explore knowledge, places, timelines, entities, or reference information from open sources.

The Preparedness Encyclopedia

fluidicice.com

The Preparedness Encyclopedia is a comprehensive portable collection of preparedness information intended to support survival during catastrophes and post-disaster societal rebuilding. It is available as a downloadable PDF file, with an optional offline Prep Drive version also offered.

Virus Encyclopedia

virus.wikidot.com

The Virus Encyclopedia is a Wikidot wiki that anyone can edit, currently holding hundreds of entries about computer viruses and worms. It covers viruses, worms and related malware, with pages on individual threats and groups, plus help pages about entry layout and wiki syntax. A featured entry describes the Navidad mass-mailer worm.

Encyclopedia of Life applies AI to data analysis, extraction, visualization, or business intelligence.

Fagan Finder

faganfinder.com

Fagan Finder is a comprehensive collection of online information-finding tools. It aggregates access to a wide range of search engines, databases, and encyclopedias, including alternative search engines, non-English search engines, utility tools, and region-specific Asian encyclopedias.

Wikipedia

wikipedia.org

Wikipedia is a free online encyclopedia created and edited by volunteers worldwide and hosted by the Wikimedia Foundation. It provides unrestricted access to knowledge without advertisements or paywalls, and depends on voluntary reader donations to cover operational costs.

Animalia

animalia.bio

Animalia is an online animal encyclopedia for learning about animals, with sections for mammals, birds, reptiles, amphibians, mollusks, fish and insects. The site also offers collections, an animal-of-the-day feature, and companion projects Animalia Pets and Dinosauropedia. Supporters can subscribe on Patreon for an ad-free experience.

Bestiary

bestiary.ca

A reference site listing beasts found in medieval bestiaries and the Physiologus, as well as animals from medieval encyclopedias and other sources. It offers alphabetic, cross-reference and category indexes, with variants from Latin, French, German, Icelandic, Catalan and Castilian among other languages.

BOMwiki is a free bill-of-materials encyclopedia that breaks products into their component parts, down to individual screws, bearings and cells. Anyone with an account can edit pages, and new contributors' changes are reviewed before going live. Each page displays a verification status.

DBDB

dbdb.io

Database of Databases is an encyclopedia of database systems with leaderboards and statistics. Its statistics page ranks 1,228 systems and breaks them down by country of origin, data model, query interface, compatibility, source code license, implementation language, project type and developer.

Deltarune Wiki

deltarune.wiki

An encyclopedia about Deltarune, the RPG successor to Undertale. The wiki states it maintains 1,143 articles and 5,307 files and can be edited by anyone, even without an account. It covers characters, enemies, items, and locations, and notes that Chapter 5 has been released, Chapter 6 is planned for 2027, and Chapter 7 has no release date.

Dota2ProTracker

dota2protracker.com

Dota2ProTracker is a website that collects Dota 2 data from 7000+ MMR and professional matches to create Dota 2 meta insights and the best builds for each hero in every position. It offers meta analytics, pro player stats, hero encyclopedias, drafting tools and item builds.

French-language general encyclopedia published by Encyclopædia Britannica.

EncycloSearch

encyclosearch.org

EncycloSearch is an ad-free, open-source encyclopedia search engine and reader supported by the Knowledge Standards Foundation. It enables users to search across more than two dozen encyclopedias simultaneously. The platform organizes content into categories including general, STEM, humanities, geography and politics, religion and mythology, and other subjects.

EveryCulture

everyculture.com

Online encyclopedia with articles on world cultures and countries, organized by region and by culture groups. Sections cover North America, Oceania, South Asia, Europe, East and Southeast Asia, Russia and Eurasia, China, South America, Middle America and the Caribbean, and Africa and the Middle East. Articles are listed under letter ranges and by individual country or people.

GodChecker

godchecker.com

Godchecker is a mythology encyclopedia covering gods, goddesses and spirits from around the world. Its Holy Database lists nearly four thousand deities from pantheons including Greek, Roman, Norse, Egyptian, Celtic and others, along with legends and folklore. It includes a Deity of the Day feature and a ranked list of popular gods. The site says it has been running since 1999.

IFWiki

ifwiki.org

IFWiki is an encyclopedia of interactive fiction covering IF history, theory, craft, tools, and people. It serves as both a historical record of community knowledge and a guide to resources for playing and creating interactive fiction. The site also lists event news, competitions and jams, meetings, and announcements.

InfoPlease

infoplease.com

InfoPlease is a free online reference service that provides encyclopedia, almanac, atlas, biographical entries, dictionary, and thesaurus content. It also offers quizzes, daily historical facts, birthday information, and current news for users.