Education
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Reedsy Discovery
A platform where readers browse and review independently published books before they hit the mainstream, helping self-pu…
Refactoring.Guru
An illustrated guide to software design patterns and refactoring techniques, with cartoon diagrams and code examples in…
Refdesk
A long-running, family-friendly index of reference resources, fact checkers, dictionaries, maps and quality links across…
Regia Anglorum
A Dark Age and Viking-era reenactment society's site full of articles on early medieval daily life, crafts, and combat.
Reginald F. Lewis Museum
The Reginald F. Lewis Museum in Baltimore explores the history and culture of African American Marylanders through exhib…
Rekhta Dictionary
An online trilingual Urdu dictionary giving meanings in English and Hindi, with pronunciation, usage, synonyms, antonyms…
Relativity: A Modern Primer
A short and sweet textbook on Einstein's theory of relativity, taking a modern approach for readers who want the physics…
Religion Compare
A reference site answering common comparative questions about belief, ritual, and practice across the world's major reli…
Reluctant Habits
A cultural forum of essays and reviews on literature, film and arts, with thoughtful takes on classics the author admire…
Ren'Py
The homepage of Ren'Py, a free open-source engine used by thousands of independent visual novel and interactive fiction…
RePEc
A decentralized index of economics research that catalogs working papers, journal articles, and software code from aroun…
Representative Poetry Online
A free University of Toronto anthology of about 4,800 poems by 700 poets across 1400 years, from Jabberwocky to sonnets,…
Resource Watch
An open data platform from the World Resources Institute mapping thousands of live datasets on deforestation, climate, w…
Restarters Wiki
A community repair wiki with guides for fixing and maintaining devices, from phones and laptops to household electronics…
Restaurant-ing Through History
A historian's blog exploring American restaurants over the centuries, from tearooms and automats to roadside diners, wit…
retractionwatch.wordpress.com
Website
Retraction Watch
A long-running blog tracking retracted scientific papers and research misconduct, offering a fascinating window into how…
Retrocomputing Stack Exchange
A question-and-answer community where enthusiasts discuss vintage hardware, obscure operating systems, and the history o…
Retrocomputing With Clash
A tutorial on designing retro computer hardware for FPGAs in Haskell, using abstractions like monads and lenses to imple…
Retrosheet
A volunteer project digitizing play-by-play accounts of nearly every major league baseball game ever played, freely avai…
Reverse Shot
The Museum of the Moving Image's online film journal, publishing thoughtful long-form criticism, symposiums, and essays…
RF Generation
A community database for cataloguing video game collections, with detailed release information used by collectors and pr…
RhymeZone
A rhyming dictionary and word-finder that returns rhymes, near rhymes, synonyms, homophones, and famous quotations for a…
Ribbonfarm
A long-running blog by Venkatesh Rao on technology, organizations, culture, and magical thinking, with decades of idiosy…
Richard A. Bartle: Entry Point
Personal site of Richard Bartle, co-creator of MUD1 and game design theorist, with his player-types essays, papers and a…
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