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
List tracks not assigned to playlists
Remove iTunes tracks disassociated from files
Download any or all available subscribed Podcast episodes not yet downloaded
Capitalize the first letter of each word in selected track names
Display, create text file listing info of dead tracks
Exports and then re-imports selected tracks' artwork