Learn something real

The real thing rather than a summary of a summary: a Nobel laureate's actual lectures, papers before the journals get them, whole libraries, free university courses. All of it free.

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13 sites

Europeana

Europe's cultural heritage — art, books, film — digitized and searchable.

History & Archives

Open Library

A real lending catalog covering nearly any book ever published, not just public domain.

History & Archives

WikiArt

250,000 artworks organized like a visual encyclopedia.

Art & Culture

Our World in Data

Rigorous, sourced charts on the world's biggest problems.

Data Storytelling

Gapminder

Correcting the things most people get wrong about the state of the world.

Data Storytelling

Musicmap

A family tree showing how every music genre connects to every other.

Data Storytelling

Observable

Live, interactive data notebooks built in the open by other people.

Data Storytelling

The Feynman Lectures

Richard Feynman's legendary physics lectures, transcribed and free.

Learn Deeply

OEIS

Type in a sequence of numbers and it tells you what it means.

Learn Deeply

arXiv

Millions of scientific papers, free, often before the journals ever see them.

Learn Deeply

Open Culture

Free university courses, audiobooks and films, aggregated in one place.

Learn Deeply

DevDocs

Dozens of languages' documentation, merged into one instant search.

Maker & Design Gems

roadmap.sh

Community-built learning paths for every dev discipline.

Maker & Design Gems