Simple script that has some great xform actions for objects and pivots
- Center Pivot
 - Send pivot to the lowest point on the object
 - Snap object's lowest point to the grid (place on grid)
 - Send pivot to origin
 - Send object (using center of bounding box) to the pivot
 - Place object on pivot (send the lowest point of the bounding box to pivot)
 
The script also features a way to close the dialog box on any button press saving user's click. This behaviour can be turned off using the checkbox.
