This plugin (aka Better Coupon Box) has long been the most popular popup plugin in Shopify, BigCommerce or Weebly (See its 3000+ reviews in Shopify Appstore), and recently been published on WordPress directory by the developer. It is a new breeze quite different from other long existing WordPress popup plugins.
Basically this plugin allows creating a coupon popup when customers enter the store, which collects email subscription or social likes in exchange for a coupon code. There are many popup templates to choose, and even a full CSS/HTML custom place for users to design a unique popup on their store.
Exit-intent popup is obviously included. Control conditions over how and when the popups should display are various as well: universal or unique coupon codes, show on specific pages only, show to target groups of customers only, show minimized button on site corner,…
Pricing: Free version & Premium version at $99 / year (Full Money-back Guarantee within first 15 days)
Install: WooCommerce Exit Coupon Popup Pro