getBrave.io - Brave is a Drag and Drop Conversion engine for WordPress that lets you create any kind of popups, sticky bars, modals, lightbox with Canva like intuitive editor. Its the most easiest way to capture leads from your website or blog.
Sumo - Free tools to grow your email list.
Age Verifier? - Shopify App - Age Verifier App to restrict under-age visitors
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
Yeello - Increase your website conversion by engaging, targeting & retaining website visitors
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.