Optimizely - A/B testing you'll actually use.
ProfitOutreach.app - ProfitOutreach is an cold email and LinkedIn message generator & writer that helps you to increase profit from outreach messages to your prospects & customers with truly personalized messages.
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.
Copy.ai - We have created the world's most advanced artificial intelligence copywriter that enables you to create marketing copy in seconds!
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Hunter.io - Find all the email addresses related to a domain