SupersonicAds (choose any offer that you like and take what is yours - BTC of course! Recommended)
ABitBack (user-friendly page, register required, many way to earn many BTC)
EasyBitCo (nice looking site with plenty of possibilities to earn BTC)
BitCoinGet (task and coins, no registration req)
BitCoinSurvey (site pay for doing simple task)
FreeDigitalMoney (sometimes you may find a good offer, it is good to check it out)
CoinWorker (pass the interesting tests and quizzes, circa 0.00061 BTC/test)
FreeBtcPt (minimum payment 25mBTC, interesting task to give money)
IWantFreeBitCoins (choose any offer and earn some bitcoins)