I downloaded the Ultimate User Interface (UUI) and basically only use about 8/30 of the add-ons it comes with. The one I used to customize my action bars and all that stuff is called "Move Anything!" It lets me hide things I don't want, move things vertically, etc. What I use for all the action buttons is called "Pop Bar" and I just have 4 rows/11 columns. The combat log can be dragged out of the regular chat log once it is unlocked.