Optimizely is a lower cost entry tool for anyone looking to do website testing. While their pricing structure has changed over the years it still is a pretty cost effective solution. It is easy to get tests up and running within 5 minutes once you have code placed on your site.
I love the drag and drop features of Optimizely. It makes it very easy to make simple changes to do landing page testing for my paid search campaigns. It also frees up dev time for our web team. Also, The findings from Optimizely tests are so valuable for an end customer experience.
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.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Media.net - Yahoo! Bing Network Contextual Ads powered by Media. net gives you instantaneous access to one of the world's largest marketplaces for advertisers. People also askWhat is Media Net?What is Medianet Cisco?
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
Outbrain - Outbrain is the world's leading performance-driven discovery and native advertising platform. We help advertisers get discovered on leading publishers websites.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.