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.
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
Perform search-and-replace on text in your choice of tags
Batch set new Last Played/Last Skipped of selected tracks
Export artwork of selected tracks to parent or specified folder
Copy chosen tag info from one set of tracks to a different set of tracks
Display, create text file listing info of dead tracks