Open Culture
openculture.com
A curated aggregator of free cultural and educational media — online courses, audiobooks, ebooks, movies, and language lessons from major universities and cultural institutions.
Why it is useful
Does the curation work of finding legitimate free versions of valuable educational content scattered across the internet — MIT courses, Yale lectures, public domain audiobooks, and classic films. The focus on quality means everything listed is actually worth engaging with rather than filler content. The language learning and free audiobook sections in particular surface resources most people never find.