Elementor - Elementor is a front-end drag & drop page builder for WordPress.
Swiper - Swiper is the most modern free mobile touch slider with hardware accelerated transitions and amazing native behavior.
Layers - A simple Wordpress site builder & its free forever
Slider Revolution - Slider Revolution is more than just a WordPress slider. It helps beginner-and mid-level designers WOW their clients with pro-level visuals.
Colibri WP - WordPress site builder that gives you design superpowers
WPMeteor - WordPress service marketplace.