List of sites earning online

Amazon's Mechnical Turk - A marketplace for work

Fanshala - For Facebook page owner

Google adsense -  Place advertisement on website or blog

Chitika - Place advertisement on website or blog

Infolinks - Place text link advertisements on website or blog

Edomz - Publishers of a website or blog

AdMedia -  Publishers of a website or blog

Clicksor - Inline textads, Graphical banners, Pop-uders

BuySellAds - Buy or Sell ads

Lijit - Advertisers and Publishers

ADTECH - A Division of AOL Networks

Zedo - Videos ads