PageLines DMS is a easy to use WordPress theme framework built around Drag & Drop interface which means you don’t need to write an actual code unless you really want to. This is one of the best performing drag & drop framework you can find. It functions similar to Google Developer Tools you can find in Google Chrome. If you are familiar with that it won’t be hard to get started with PageLines DMS.
Drag & Drop is really nice addition to theme development, so non-developers can build their own custom themes and website. This is something you can’t do with a regular WordPress installation.