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.

Gregor Capuder

ProteusThemes

Primoz Cigler

Page Builder by SiteOrigin editor is great, but it lacks a “tabs widget”, so we created one.
The “Tabs for Page Builder” widget allows you to add multiple tabs with a tab name and tab content. The tab content is using the Page Builder editor, so you can build your own layout inside the tab content (add widgets, set columns, …).
The front-end display is the same as the tabs in Bootstrap framework.
<a href="http://gregorcapuder.com/tabs-widget-for-page-builder/" rel="nofollow ugc">More details about this plugin can be found in this post</a>.
Note: the front-end design is “bare bones”, so only the default Bootstrap CSS is used. So you should style it to your own liking with custom CSS. Maybe we will add some custom skins in the future, but I can’t make any promises.

Tabs Widget for Page Builder

Adds a "Tabs for Page Builder" widget, which can be used in Page Builder by SiteOrigin editor.

Tiny Grid vs Tabs Widget for Page Builder