This tiny (5KB, < 200 lines) JQuery Bootstrap plugin turns any DIV into a WYSIWYG rich-content editor, inspired by CLEditor and bootstrap-wysihtml5. Here are the key features:

Automatically binds standard hotkeys for common operations on Mac and Windows
Drag and drop files to insert images, support image upload (also taking photos on mobile devices)
Voice dictation input (only in Chrome)
Allows a custom built toolbar, no magic markup generators, enabling the web site to use all the goodness of Bootstrap, FortAwesome and so on...
Does not force any styling - it's all up to you
Uses standard browser features, no magic non-standard code, toolbar and keyboard configurable to execute any supported browser command
Does not create a separate frame, backup text areas etc - instead keeps it simple and runs everything inline in a DIV
(Optionally) cleans up trailing whitespace and empty divs and spans
Requires a modern browser (tested in Chrome 26, Firefox 19, Safari 6)
Supports mobile devices (tested on IOS 6 Ipad/Iphone and Android 4.1.1 Chrome)