I'm not sure exactly what you mean by an options bar, but the API does support several types of ribbon controls.
http://help.autodesk.com/view/RVT/2016/ENU/?guid=GUID-1547E521-59BD-4819-A989-F5A238B9F2B3
i see split buttons, drop down buttons, radio buttons, text boxes, combo boxes, stacked panel items, and slide out items.