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

Vungle - Vungle helps mobile application developers promote and monetize their apps through in-app video trailers.

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

Smaato - Smaato is a mobile-first platform and free ad server for publishers & app developers.

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.

Widespace Summit - Summit is a full-stack programmatic ad platform and marketplace designed specifically to deliver branding campaigns on mobile.