Monstroid2 - Monstroid is a multi-purpose modular WordPress emulator, which gives you the power of unlimited creation of designs for your site, provides you premium themes with built-in readymade templates.
Divi Theme - A flexible WordPress theme with the power of Divi Builder built in.
GeneratePress - Responsive, easy to use WordPress theme
Elementor - Elementor is a front-end drag & drop page builder for WordPress.
Envato - Join millions and bring your ideas and projects to life with Envato - the world's leading marketplace and community for creative assets and creative people.
SiteOrigin Page Builder - Build responsive grid-based page content that adapts on WordPress