iTunes only allows one playlist to be selected at a time. This applet can perform common useful tasks on a multiple selection of playlists: rename (add text, remove text, search and replace text), duplicate, delete, export, merge.
OS X 10.6 or later only.
Tools in the Rename tab operate on the selected playlists' names
Remove iTunes tracks disassociated from files
Assists with finding truncated iTunes Match tracks
Play through each track in a playlist at your set interval
Set choice of various number tags of selected tracks incrementally
Set the Plays of selected tracks.
Exports and then re-imports selected tracks' artwork