What are some alternatives?
When comparing 360 Polaris and Google Ad Manager, you can also consider the following products
MoPub - MoPub is a mobile monetization platform that helps publishers drive more revenue from advertising and mobile transactions.
OpenX - Ad technology platform available as a hosted service or as an open source download.
AerServ - AerServ offers monetization solution for mobile publishers.
ONE by AOL - Ad Serving and Supply Side Platform (SSP)
px - px tells you what processes are running on your system and how they are interconnected.
AdSense - Earn money with website monetization from Google AdSense. We'll optimize your ad sizes to give them more chance to be seen and clicked.