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.
Cruip - Landing page templates for startups
Elementor Popup Builder - Design-oriented popup builder, built into Elementor
Shade - Super easy color contrast insights and recommendations
13Chats - Pop-ups and widgets based on client actions on your website
LP151 - You can create a landing page here