Simplified WYSIWYG Editor (Bootstrap): Summernote
Summernote is a simple, clean and flexible WYSIWYG Editor that is built on top of jQuery and Bootstrap.
It supports Bootstrap’s both active versions (2 and 3) and has keyboard shortcuts for all major tasks.
There is a powerful API which provides lots of customization options in means of design (width, height, active items..) and functionality.
The project also has integration samples for major scripting languages or frameworks (PHP, Ruby, Django, Nodejs).