callofsorrow

With this plugin it’s very easy to add the grid system from Twitter Bootstrap to the tinymce editor. 
You can place your content wherether you want.
<h3>Credits</h3>
Feather Icons: http://colebemis.com/feather/

Tiny Grid

This plugin adds buttons to the TinyMCE Editor to use the bootstrap grid system.

Daniel Nice

This plugin creates a button inside of every rich text editor within WordPress which allows the user to insert pre-built Bootstrap compatible code into the editor. This plugin includes the ability to add Buttons, Wells, Labels & Badges of different sizes and styles easily into your WordPress pages or posts. It also allows you to include the default Bootstrap CSS for these objects in your WordPress editor and your template if you wish.
In addition if you want to you can modify the “display.css” to customize the look of the bootstrap elements.
This is a great plugin if you use a bootstrap theme such as the Roots theme.

Bootstrap MCE Elements

Creates button within WP TinyMCE which inserts Bootstrap Buttons, Wells, Labels & Badges of different sizes and styles into your post/page.

Tiny Grid vs Bootstrap MCE Elements