Courses

A community-maintained GitHub curriculum assembling a full computer science degree from free courses.

One of GitHub's most starred repositories, indexing free books, courses and cheat sheets in dozens of languages.

Free, structured lessons and practice across maths, science and economics from primary school to early university.

The largest catalogue of university and industry courses, with financial aid available on most paid tracks.

University-run courses from MIT, Harvard and hundreds of others, auditable free without paying for a certificate.

Materials from thousands of actual MIT courses, including lecture videos, problem sets and solutions.

Grant Sanderson's animated maths explanations, the standard recommendation for linear algebra and calculus intuition.

The open-source spaced repetition system that underpins how most serious self-learners retain anything.

Completely free audio language courses built on a thinking method rather than memorisation, funded entirely by donations.

Free coding practice in over seventy languages with human mentors who review your solutions.

Short animated lessons on almost any subject, each paired with follow-up questions and further reading.

Complete video recordings of Yale's introductory lecture courses in philosophy, history, literature and the sciences.

A short, opinionated curriculum naming the one best book and video course for each core computing subject.

Genuinely free, self-paced college-level courses with exams that can earn transferable credit.

The Open University's free course library, spanning health, history, languages and business with certificates on completion.

Free, openly licensed university textbooks across every major discipline, replacing hundreds of dollars of course reading.

Research-based physics, chemistry and biology simulations from the University of Colorado that make abstract concepts tangible.

Kalid Azad rebuilds maths concepts around intuition first, famously effective for calculus and Fourier transforms.

Complete, clearly written notes and worked problems for algebra through differential equations.

An interactive, browser-based introduction to how music is made, requiring no instrument or software.

Free complete video training courses for CompTIA certifications, widely used to get into IT without paying for a bootcamp.

Free interactive chess lessons, puzzles and studies on a site with no ads and no paywall.

The Tailwind creators' tactic-by-tactic design book and video course for developers who can't hire a designer.