Bitcoin Collection
FreeBitco.in - (Hands down my favorite faucet)
BitcoinGet -(Best site for earning Bitcoins for tasks)
Qoinpro - (Register for free Bitcoins, Litecoins, and other alt-coins every day, automatically. More features coming. Make sure to activate your registration, too)
BitVisitor -(Earn Bitcoins every 5 minutes - pays daily)
GratisBitco.in - (Free Bitcoins every hour by rolling virtual dice—payment based on the number you roll)
DailyBitcoins - (Hourly faucet. Current "prize" structure makes it easy to get higher payouts)
MMOClub.com Faucet - (Hourly faucet that pays between 1 and 500 sathoshis)
Bitcoiner.net and Litecoiner.net - (Two daily faucets that pay like clockwork)
 
Mirowallet.org Collection (These faucets all pay into one Microwallet account for fast accumulation and payouts. This is a good format that's easy to use.)
PayFaucet - (A half-hour faucet that pays out 50-200 satoshis every visit)
DailyFreeBits - (A 6-hour faucet that pays out 100-1200 satoshis with each visit)
LandOfBitcoins.com - (Automatic free Bitcoins every minute (renewable every half hour))
New - CoinOmega - (Choose your timing - 10 minutes, 1 hour, or daily faucet)
New - Crypto Faucet - (12 hour faucet paying up to 300 satoshis)
Bitcoin Tap - (A daily faucet paying 400-2000 satoshis. See full review below for more)
BitcoinGator - (A 6-hour faucet that pays 10-500 satoshis)
New - Persian Faucet - (Two faucets on one page, but it generates a ton of popup webpages)
Bitcoin Earn - (A 20 minute faucet with an automatic feature, too. See full review for more)
Fibonacci Faucet - (A two-hour faucet with small payouts)
 
Coinbox.me Trio - (Same as above, they all pay into a Coinbox account with fast, automatic payouts)
Señor Bitcoin - (A half-hour faucet that pays 20 satoshis)
Can Has Bitcoin - (A half-hour faucet that pays 80 satoshis)
FaucetBTC - (A half-hour faucet that pays 20 satoshis)
 
Other Faucets
BitcoinFaucet.tk - (A 6-hour faucet with small payouts, but regular payments)
FreeCoins4.me - (A small amount of free Bitcoins every 8 hours. The site is in alpha, with more features coming soon.)