OS X 10.8 or later. Assists with segregating iTunes Match tracks that appear to get cut-off when played (due to a possible bug, described here). Then these truncated tracks can be deleted and re-downloaded intact (by you, not the script).
Batch-append text to comments
Perform tasks on a batch of playlists; rename, delete, duplicate, merge, more
Gather audio tracks whose files contain no artwork metadata
View/Edit tags of selected track(s) in single window
AppleScript wrapper for afconvert rips CD tracks as Constant Bit Rate AACs
Set the Plays of selected tracks.