OS X 10.8 or later. Set Last Played/Last Skipped date of selected tracks to a new date, with option to increase or decrease Plays/Skips, or set to no date and no Plays/Skips.
Also see Add or Subtract Play Count.
Like so. The Last Played date of the selected tracks will be set to June 10, 2014 at 9:45AM and the Plays will be decreased by 3. The latter is an option that can be toggled on and off with the checkbox.
Set year of selected tracks to their release date's year (if available)
Remove iTunes tracks disassociated from files
Change video kind and video related tags of selected video tracks
Set choice of various number tags of selected tracks incrementally
Displays files in iTunes Media folder not in iTunes track library
Two scripts copy text from clipboard to current or single selected track's lyrics tag