Trace Elements Plugin for Redactor – AnthonyMineo.com
GitHub - vint21h/redactor-plugins-lineheight: redactor-plugins-lineheight is a plugin for Redactor Text Editor (http://imperavi.com/redactor/) to set selected text line height
How to create an Imperavi Redactor plugin | Pixelswap
10 Best jQuery and HTML5 WYSIWYG Plugins - SitePoint