I prefer to define this plugin as a “grid builder” instead of a page builder, because a page builder is commonly intended as a tool that allows to create sections and, usually, comes with shortcodes such as tabs, accordions, particular sections, galleries etc… And, in many cases, all these shortcodes are not compatible with other similar plugins you prefer to use.
Demo: http://codecanyon.net/item/pixgridder-pro-page-grid-composer-for-wordpress/5251972
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