Every 30 Minutes 

http://canhasbitcoin.tk/ (every 30 minutes)
http://www.btc4you.com/  (every 30 minutes)
http://freebitcoins.me/  (every 30 minutes)
http://www.freebtc4all.com/  (every 30 minutes)
http://www.thefreebitcoins.com/ (every 30 minutes)
http://www.virtualfaucet.com/ (every 30 minutes)
http://www.elbitcoingratis.es/ (every 30 minutes)

Every Hour

http://dailybitcoins.org (hourly) 
http://www.bitcoins4.me/ (hourly)
https://coinad.com (daily-hourly with registration)


Every Day

http://bitcointree.net (daily)
http://boklund.nu/bunnyrun/(daily)
http://freecoins.herokuapp.com/ (daily)
http://netlookup.se/free-bitcoins/(daily)
http://www.bithits.info/ (daily)
http://cointicket.org/ (daily)

And more

http://www.bitcoin4you.net/
http://www.bitcoinar.net/
http://coinad.com/
http://earnfreebitcoins.com/
http://www.btctrade.org/faucet.html
http://www.rugatu.com/questions/13051/bitcoin-faucets
http://btcflow.net/
http://freebitcoinlottery.com/?a=1Q8w3aYNJxbg3kTwkcFyusxjVcVwgy1eRW
http://www.bitcoinforest.com/
http://paperco.in/generate.php
http://bitbin.it/index.php
http://bitcointree.net/