What are some alternatives?
Google Ad Manager - Grow revenue wherever your users are with an integrated ad management platform that surfaces insights for smarter business decisions.
Google AdSense - Use Google AdSense to make money online by placing ads on your website and YouTube channel. Start monetizing your website with Google AdSense today.
OpenX - Ad technology platform available as a hosted service or as an open source download.
Epom Ad Server - An ad serving solution for publishers, advertisers, ad and affiliate networks
AerServ - AerServ offers monetization solution for mobile publishers.
Infolinks - Discover what Infolinks smart ads can do for you