GrowthTools provides you 20+ sales triggers to build trust, create urgency and inspire actions. 100% free.
NotificationX - Best social proof and FOMO marketing solution for WordPress to increase conversion rates.
SocialProofy.io - Social Proofy is a marketing platform that applies the psychological concept called social proof to help businesses.
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.
Fomo - Fomo turns your site into the online equivalent of a busy store
ProveSource - ProveSource is a social proof marketing platform that streams recent customer behaviors on your website to build trust and increase conversions.
Evidence - Evidence uses the power of social proof to let your existing users and customers do the selling for you.