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

Q-Stats - Get free marketing insights for every question on Quora.

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

Site Rank Data - View historical rank information of websites via time series charts.

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.

HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.