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.

Google Ad Manager - Grow revenue wherever your users are with an integrated ad management platform that surfaces insights for smarter business decisions.

Contextly - Contextly provides content recommendation system for publishers.

OpenX - Ad technology platform available as a hosted service or as an open source download.

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

AerServ - AerServ offers monetization solution for mobile publishers.