We'll create fresh WordPress site with Simple CallToAction PopUp installed. You have 20 minutes to test the plugin after that site we'll be deleted.
This plugin allows you to create a simple popup for various purposes and insert a shortcode on the page anywhere
Use shorcode [simple_popup id="" class="custom_class"]
Source code for this plugin is stored on Github. It is an open source project. If you want to help to make plugin better, you can:
1. Create an issue with your suggestion and proposition of how to improve plugin functionality
2. Report a bug
3. If you are a developer you can fork this project and create pull-request with your improvements