AtroPIM - AtroPIM is a free, 100% open source and configurable PIM solution. It's easy to keep catalogs up to date, add new products or change existing ones, deliver your current product information across all channels.
Optimizely - A/B testing you'll actually use.
Pimberly - The most powerful Product Information Management platform on the planet.
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.
Bluestone PIM - Sales depends on how well you present your product.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.