Not part of the toolbar as a button, but it won't add to the complexity to have them as an option...

For example...
SCALEARRAY : we got to have it as an option when using the command array
CLOCKBAR : Should be added to general options
MEASURE DISTANCE : I know that there will be dimensions soon but we go to have this, all of us need it
ZOOMING AND PANNING WITH ARROW KEYS : A nice add-on, why isn't it a part of MoI?
SELECTCURVES: Very nice to have, I know that selecting objects will be added later...