Along with the new WordPress 4.4, theme and plugin developers are swiftly moving to upgrade their products. 22 plugin updates and 11 theme updates in the last two days alone.
Elegant Themes has just released a plugin that gives you all the functionality of the page builder built into the Divi theme, allowing you to use its advanced page-builder features in most any theme you choose. As in the full theme package, the Builder comes with a set of ready-made layout options, and many content modules that you place with a drag-and-drop interface.
We’ve got you covered.
Here’s a very detailed article from WPMU on various tactics and options.