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. PixGridder is instead very simple, because it only allows to split your page (or post or custom post, you can decide it) in rows and columns, simply by moving the functions available on your tinyMCE editor from the whole page to each column you decide to split your page in. In this way you can use the plugins you prefer with the shortcodes you prefer (and also the buttons available on your tinyMCE editor) since the editor it is exactly the same one you would have without using PixGridder.
Download PixGridder Pro Page Grid Composer for WordPress 3.3.4 at WP Liga for Free with an active Membership. You will receive the exact same .zip file distributed by the original author, secure and 100% virus free.