[dm2]

http://bootsnipp.com/ is nice, doesn't have everything but can speed up prototyping dramatically.

[notastartup]

that's an awesome site, wonder if there is anything more like it

[dm2]

There are tons of them.

Below is a good list of them that has been around for a while, enjoy.

http://bootstraphero.com/the-big-badass-list-of-twitter-boot...