Easy Side Tab Pro – is a Call To Action Floating Tabs plugin for WordPress which allows you to create any number of quick side tabs and stick them to any of the vertical or horizontal edge position. When the tab is clicked the popup associated to that tab pops out. The plugin has a very easy and user-friendly backend interface to create your tabs and assign different functions to each of the tabs.

Demo: https://codecanyon.net/item/easy-side-tab-pro-responsive-floating-tab-plugin-for-wordpress/22296723