Custom Tab

Would it be possible to create a custom tab or panels with existing Revit tools. Example, Have a mechanical panel with all the mechanical tools and then say have a separator with some of the other tools from other tabs. Maybe make a way for the end user to create or modify panels by pulling in different tools from within Revit already?

Almost like a custom toolbar in acad. This would help and possibly speed things up instead of dealing with 5 or 6 different tabs, you only have to deal with one. That could be very useful for a lot of people.