Pay Per Click(PPC) These sited pay .01 to $4 dollars
Pay Per Lead.These sites pay you 0.5 to $100.
Pay Per Sale.They pay you upto1 to $200 Per sale.
Pay Per Signup.They pay you 0.1 to $2.
Pay Per Day/Weak They pay according to the rank of the website.
Freelancer.Here you have to bid on different projects and you are paid on completing whole the project.
Paid to Click(PTC) These sites pay you by clicking ads.One ad remains 10,20,25 or 30 second.There mode of payment is Via Alertpay or Pay Pal.