I still need to organize the list but I have been ask for more links, so here it is, I will organize it better and add better information about them, that is coming.
The Famous and Must Check
The Cash Surfing Network
Claim a USD$12 Signup bonus by registering in the Cash Surfing Network, and then registering in the following 6 sites, and browsing 550 ads on each.
The gamification of several systems, you can earn rewards from multiple sites, some of them are:
Goettman Power Surf
Surf these 4 Traffic Exchanges At the Same Time for a 35% Surf Bonus. Work As A Team To Fill the GPS Meter and Generate a Site Wide 100% Surf Bonus.