Is there a crowdfunding site for Bitcoin? Does a crowdfunding site like kickstarter.com exist, which accepts bitcoins instead of dollars?
For donation-based crowdfunding:


http://www.BitcoinStarter.com
http://www.CoinFunder.com
http://www.nestorbooster.com
http://ignitiondeck.com/id/bitcoin-crowdfunding


There's also:


http://www.Propster.me
http://www.PirateMyFilm.com
http://www.Booster.io


and some day coming back:


http://www.BitcoinChipIn.com


Of course, the "equity" markets for equity-based crowdfunding:


http://www.BitFunder.com
http://www.MPEX.co
http://www.CryptoStocks.com


And a forms of microlending from the crowd include:


http://www.BTCJam.com


and others.

[Update: Thanks to others answering this question as well, I've updated this list with their input as well.]