Advercash

this one is famous! it's a good ptc site, but I think it has a high payout, look what it offers:
payout: 12,50
ads to click daily: 7+
per click: 0,5 - 1,5c
per refferal click: 0,5 - 1,5c
good thing: many people have been paid, you can use your balance to advertise, buy refferals or upgrade anytime. great!
bad thing: the payout is too high
you can join clicking in the banner