YellowPencil is a WordPress CSS style editor plugin that allows you to customize your website design in real-time.
Demo: https://codecanyon.net/item/yellow-pencil-visual-css-style-editor/11322180
Pencil is a clean, responsive and easy-to-use Joomla template based on Warp 7 framework.
Demo: https://themeforest.net/item/pencil-personal-portfolio-and-one-page-resume-responsive-joomla-template/21346375