Panels, tabs menus and editors

It is a new type of tab menu, the main advantage is that you can change quickly between different editors more used. And it's more intuitive.

You could drag and drop to divide the panel.

Or create a new column

If you are not interested in an editor, you can check out the menu

You can choose how to display each menu. I bring this concept from GIMP.

I believe that vertical tabs are a bad UX pattern. But you can also configure it vertically if you like.

If you have many addons installed can occupy a large space of your menu, a solution that occurred to me is to be able to contract or expand the set of them.

The following are some discussions on different parts of the proposal:

New user interface concept

Funny navigation widget and split area widget

A quick and easy way to change the position of the origin