StackAdapt - Native advertising demand side platform.

Fark - Fark is a web-based platform for getting news and articles on interesting and amazing stories that are being submitted by the other users of the Fark.

Zemanta - Zemanta is an online content and links suggesting platform that provides a plugin to the bloggers, publishers and other types of content creators.

News.me - News.

Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.

Digg - Digg delivers the most interesting and talked-about stories on the Web right now.