Some days you feel like listening to the most hardcore music in your playlist, but some other days you may just want to listen to some peaceful songs.
With Moody, you'll be able to adjust your playlist to those different states of mind and create song selections accordingly. The program, which works as a plug-in for iTunes, displays a small interface with a color chart where you only need to click on the color that better represents the feelings you experience with any given song.
Then, based on this color categorization, the program creates iTunes playlists that suit different moods: happiness, melancholy, sadness, etc. Plus, you can use it to manage iTunes controls (play, stop, previous and next track) from its interface.
Moody works generally fine. Just remember to run iTunes before launching it. Also, I missed having some kind of message when I click a color that doesn't have any song linked to it yet.
With Moody you can easily create iTunes playlists that fit your particular mood on different days.