1. Elementor
https://elementor.com/?gclid=CjwKEAiA9s_BBRCL3ZKWsfblgS8SJACbST7DVa5qhBDK2zV95TGlWItNiJp0hU3ntrQnuG883e8H_RoCN-7w_wcB

2. BeaverBuilder
http://kb.wpbeaverbuilder.com/collection/7-beaver-builder-theme

3. WooThemes – Canvas
http://www.woothemes.com/products/canvas/

4. _s Underscores
http://underscores.me/

5. Genesis
http://studiopress.com/