Check out http://cssrecipes.github.io/ (from me & friends) and http://www.basscss.com/
http://www.basscss.com/docs/base-buttons/
Perhaps shouldn't be asking here, but why does a button element get a different style than .button links and inputs?
I like the idea of this library, but that's not leaving a good taste in my mouth.
It'd be nice to see CSS frameworks rewritten using pure CSS (transpiled with cssnext); in fact I might give it a try if I get motivated :)