Too bad .edu seems to be restricted to US-based schools. There's plenty of great stuff hosted by universities in other countries but none of them are on the .edu TLD.
There are other national domain schemes with educational subdomains. 'ac.uk' and 'edu.au' being two of which I'm aware.
A listing of top global educational institutions would only have a few thousand entries.
It's not without some irony that I note that the early, and much belated, Internet was largely edu domains, along with a handful of tech firms, government agencies, and military entities.