Websites
9,043 websites · most loved first · page 224 of 377· Tonble one of these
Open Source Shakespeare
A searchable, free digital edition of Shakespeare's complete works, with concordance and word-frequency tools for close…
Open Startups
A directory of startups that publish their revenue, metrics, and stories openly, useful for seeing what real indie produ…
Open Syllabus
A project that maps the college curriculum across tens of millions of syllabi, letting you explore which books and texts…
Open Textbook Initiative
A curated list of free open textbooks in mathematics from the American Institute of Mathematics, covering topics from ca…
Open Yale Courses
Free and open access to a selection of introductory Yale University courses, with full lecture videos, syllabi, and tran…
Open.gl
An extensive, beginner-friendly guide to modern OpenGL for game development on all major platforms, taking you from a bl…
Open5e
A clean, fast reference for the Dungeons and Dragons 5th Edition open rules, with searchable monsters, spells, and class…
OpenBenches
A crowdsourced map of more than 44,000 memorial benches and their inscriptions - search the touching dedications or jump…
OpenBooks
A retro-styled portal to the open web made by people rather than algorithms, with a search, directory, cool links, a man…
OpenBSD
The home of OpenBSD, a security-focused Unix-like operating system known for its clean code, strict licensing, and disti…
OpenCanada
A publication of Canada's international affairs institutes that explains and analyzes Canada's place in the world throug…
OpenCorporates
The largest open database of companies in the world, searchable by name or jurisdiction to look up registrations, office…
OpenCritic
A review aggregator for video games that ranks critics transparently and summarizes scores from hundreds of publications…
opendata.swiss
Switzerland's national open data portal, aggregating public datasets from federal, cantonal, and municipal authorities a…
OpenFactBook
A community-maintained successor to the CIA World Factbook with free data on 260+ countries covering geography, people,…
OpenGameArt
A community repository of freely licensed sprites, music, and 3D models that developers can legally use in their own gam…
OpenGL Tutorial
Free step-by-step tutorials for modern OpenGL 3.3 and later in C and C++, from the first triangle to lighting, textures…
OpenGLBook
A free OpenGL programming tutorial in online book format, walking through the fundamentals of graphics programming one c…
OpenLearn
The Open University's free learning platform with nearly a thousand self-paced courses across science, history, language…
OpenMoji
An open-source emoji library of over four thousand square-styled icons that anyone can search, customize the color of, a…
OpenSecrets
A nonpartisan research group tracking money in US politics, with searchable databases of campaign contributions, lobbyin…
Opensource.com
A community publication with articles, tutorials, and stories about open source software, hardware, and culture from dev…
OpenStax
A Rice University nonprofit publishing free, peer-reviewed, openly licensed textbooks for college and high-school subjec…
OpenStax
Free peer-reviewed college textbooks in math, science, social sciences and humanities, readable online and downloadable…
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