Optimizely - A/B testing you'll actually use.
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
OptiMonk - OptiMonk is the most powerful Onsite Retargeting platform, that helps you increase the conversion rate of your site, and get more leads by recovering lost visitors.
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.
POPUPSMART - A no-code tool to increase e-commerce sales, build email lists and engage with your visitors in just 5-minutes.