Focus Tool is a dockable pane that puts the camera and focus controls I actually use in one place.
The big one for me is the manual focal plane.
This is the main reason I created the tool. I was tired of dancing around my scene like an ungraceful ballerina trying to work out what my bloody camera was actually focused on.
Turn on the focal-plane preview and you can see exactly where your focus is without leaving the camera and wandering around the scene trying to line everything up.