AdHitz - Lets you sell ad space on your site. You choose the details and then paste the code to your site.

AdinPlay - Maximize the ad revenues from your websites, apps and online games. AdinPlay is a specialist in video, rewarded video, standard and native banner ad formats.

AdVirte - An advertising network for both advertisers, and free for web-masters who want to monetize websites...

AdMob - Earn more from your mobile apps using in-app ads to generate revenue, gain actionable insights, and grow your app with easy-to-use tools.

Google Ads - Easily boost website traffic and sales with Google AdWords. Appeal to customers who are already interested in what you are advertising by appearing on Google searches.

Adstronomic - Gaming App Players Acquisition Made Cheap.