>Ideally they should be responsive, work on decently current browsers

So you mean this website? http://motherfuckingwebsite.com/

It's great. "This site doesn't care if you're on an iMac or a motherf*ing Tamagotchi." Perfectly reasonable and I very much respect this approach.

See http://www.fonerbooks.com/ on self-publishing. web 1.0

I'll add Metafilter. Simple, no CSS or HTML5 tricks. Loads in a heartbeat. Doesn't crash my old iPhone like, oh, Medium, Wired, Atlantic, or any of the other modern sites.

They just updated their look, but it doesn't take much longer to load than their old look. (Members default to the old look so you might not have noticed.)

Not really, but it's cool anyway :)

Been posted several times on HN but April Zero always deserves a shout.

http://aprilzero.com

I regularly browse beautifulopen.com for inspiration. They're not all amazing, but there are definitely some gems there.

The interfaces and designs from MetaLab are some of the best around. http://metalab.co/

Check out this site that lists really good landing pages. http://www.land-book.com