Education
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CORE
The world's largest collection of open access research papers, with over 200 million papers you can search and read free…
CORE Econ
A free, open-access economics curriculum built by an international collaboration of economists, teaching the subject thr…
Core MBA
A free mini MBA with 16 courses on strategy, marketing, finance, AI, and leadership, taught through text-based business…
Corey Robin
The blog of political theorist Corey Robin, a professor at Brooklyn College and the CUNY Graduate Center, with essays an…
Cornell Home Gardening
Cornell University's home gardening hub with growing guides for flowers and vegetables, tips on choosing plants by size,…
Cornell University Library Online Exhibitions
Dozens of online exhibitions from Cornell's library, covering topics like bird extinction, glacial science, women botani…
Corpus Delicti: the Doctor as Detective
A Harvard online exhibition on the birth of forensic medicine, telling the story of its Department of Legal Medicine and…
CountryEconomy
A reference site with the latest economic and sociodemographic data by country, covering topics like GDP, debt, inflatio…
Courtenay Museum & Paleontology Centre Blog
A museum blog from Vancouver Island covering Cretaceous marine reptile fossils, local natural and cultural history, lect…
CourtListener
A non-profit legal search engine for case law, PACER documents, judges, and oral arguments, with alerts that update as n…
Covert Shores
Independent naval analysis and open-source intelligence focused on submarines, unconventional warfare and special forces…
Coyote's Link Hub
An essayist's hub of curated links, essays and bookmarks, with a good web graveyard, a halloween web page, and handy gui…
Craft Yarn Council Knitting Guide
Step-by-step knitting and crochet instruction from the Craft Yarn Council, starting with the garter stitch for complete…
CraftBeer.com Beer Styles
A guide to more than 75 beer styles, each with its history, vital statistics, flavor notes, and food pairing ideas, from…
Crafting Interpreters
A free online book by Robert Nystrom that walks readers through building two complete programming language interpreters…
Creative Coding Notebooks
A set of Python notebooks teaching the fundamentals of creative coding and computer art, with recipes for generating ima…
Cristal Baschet
Thomas Bloch's guide to the cristal Baschet, an eerie instrument played with wet fingers on glass rods, with videos, pho…
Critical Atlas of Internet
Louise Drulhe's illustrated research project exploring fifteen spatial metaphors of the internet to expose its social, p…
Critique Circle
A free online writing workshop connecting authors for structured peer critique of short stories, novel chapters, and poe…
Crooked Timber
A long-running group blog by academics writing on politics, economics, philosophy, books, and culture, from sharp essays…
Crossword Unclued
A long-running blog for cryptic crossword lovers, with a beginner's guide, solving tips, clue-writing tricks, grid oddit…
Crypto 101
A free introductory course on cryptography covering block ciphers, hashing, key exchange and common pitfalls, aimed at r…
Crypto Museum
An extraordinarily detailed online museum documenting historic cipher machines, from the Enigma to Cold War spy radios a…
Cryptoclub
An educational outreach project teaching classical cipher-breaking through hands-on activities, letting visitors crack C…
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