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.
AerServ - AerServ offers monetization solution for mobile publishers.
Pixfuture - Pixfuture is a self serve advertisement platform for advertisers and publishers.
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.