NotificationX - Best social proof and FOMO marketing solution for WordPress to increase conversion rates.

Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.

Nudgify - Nudgify is a Social Proof App that includes FOMO, Urgency and Review Nudges. Adding Social Proof notifications to your site helps you build trust and increase conversions on Shopify, Wordpress or any other platform.

User Onboarding - Onboarding teardowns of popular sites/services

Optinjar - Optinjar helps online business increase their leads and sales by showing real-time social proof.Visitors will see notifications on the page when other people sign up or purchase.You can get subscribers and email addresses w Optinjar in a short time!

UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.