Gives bitcoins out for free to each visitor. IP addresses that receive bitcoins are recorded, so that bitcoins are given only once to each address. It is operated by Gavin Andresen.
The amount of bitcoins given per visitor depends on the amount of bitcoins in the faucet account. Currently, it gives out 0.001 bitcoins.
People can donate to the faucet account.
There is a separate TEST Bitcoin faucet that gives test bitcoins for people who want to do tests on the Testnet.