Syntonetic is offering Playlist DJ completely for free until October 31st. So, head over to the Ovi Store to save 4.99€ . This is an indeed nice introductory offer. Playlist DJ works on all S60 5th Edition devices. So the N97, 5800 XpressMusic, 5530 XpressMusic, 5320 XpressMusic are supported.
About Playlist DJ:
Unleash the DJ inside you. Instantly create new playlists. Match your music to your mood or change your mood with your music. Playlist DJ automatically analyzes and profiles your music collection, then builds playlists at your command. You simply set the fun and colorful mood and tempo sliders, or start with a favorite song. Discover music you forgot you had.