Best CSS gradient, shadow, radius, transition and transform WYSIWYG editor I’ve seen to date. You can create instances for :hover, :active, custom class states. You can also work with transitions and transforms.
FROONT seems to be worth playing with.
Jetstrap may be useful.
wysihtml5 is an open source rich text editor based on HTML5 technology and the progressive-enhancement approach. It uses a sophisticated security concept and aims to generate fully valid HTML5 markup by preventing unmaintainable tag soups and inline styles.