This stay-open applet watches your playing tracks and when an un-rated track starts playing displays a window with a demand it be rated.
While you could easily rate the current track from the iTunes icon in the Dock, this script interrupts you and compels you to do so.
OS X 10.6 or better only. Previous universal version available at the link below in the "Info" section.
This window will pop up when a new song begins playing.
Set choice of various number tags of selected tracks incrementally
Convert selected tracks and export the converted files to a new folder
Copy chosen tag info from one set of tracks to a different set of tracks
Perform search-and-replace on text in your choice of tags
Create a playlist for each entry of a specified tag
Export info to HTML doc