Samuel Mello

This plugin was designed to create virtual micro-sites that employ different themes while using the same content from one source. It uses WordPress’s rewrite rules to decide which theme to display to the end user based off of the url they visit. This will allow you to access the same website in a virtual sub-directory with a completely different theme displayed.
REQUIRES PRETTY LINKS TO BE TURNED ON

Cameleon

Virtual Microsite Creator & Multi-Theme Enabler for WordPress

Elementor

Hello+ is a free WordPress plugin designed to work seamlessly with Elementor’s <a href="https://profiles.wordpress.org/elemntor/#content-themes" rel="nofollow ugc">Hello suite of themes</a>. It provides a solid foundation for crafting unique, purpose-driven websites using Elementor’s drag-and-drop site builder.
Hello+ includes specialized Hello widgets such as a Header, Footer, Zigzag, Form Lite, and more. Hello widgets help you build faster and create polished, professional websites.
To use Hello+, you’ll need to <a href="https://profiles.wordpress.org/elemntor/#content-themes" rel="nofollow ugc">install one of Elementor’s Hello suite of themes</a>.
<h3>Copyright</h3>
This Plugin, like WordPress, is distributed under the terms of GPL. 
Use it as your springboard to building a site with Elementor.

Hello Plus

Hello+ is a free WordPress plugin designed to work seamlessly with Elementor’s Hello suite of themes.

Cameleon vs Hello Plus