Free courses, frequency lists and spaced repetition.
Spaced-repetition software plus shared decks for the most common vocabulary in dozens of languages. Learning the top 1,000 words first is the difference between months and years.
Thousands of hours of coding lessons and certifications.
Interactive course · BSD / open
The best introduction to computer science, free to audit.
Video course · Creative Commons
Maths, science and economics from basics to advanced.
Course platform · Free tier — no card required
Real MIT course materials, openly published.
Course materials · Creative Commons
How valid tests are actually built and validated.
Open textbook · Creative Commons
Measurable typing improvement in minutes a day.
Web app · GPL / open source
NDAs, contractor agreements and SAFEs, openly licensed.
DOCX / PDF · Creative Commons
Revenue, churn, CAC and runway in one spreadsheet.
Spreadsheet · Free tier — no card required
The decks that raised money, page by page.
PDF collection · Publicly shared
