Elementor - Elementor is a front-end drag & drop page builder for WordPress.
Layers - A simple Wordpress site builder & its free forever
WP Page Builder - A free, fast and intuitive WordPress page builder
Designmodo - Timesaving tools for designers, developers and marketers. Designmodo offers website and email builders.
Cruip - Landing page templates for startups
10Web - All-in-one WordPress website builder