I've talked about SoundFlavor, Pandora (also see Boy and Man), The Filter, neglected to mention MOG or beaTunes, but now there's yet another way to get more "juice" from your music. Tangerine, a Mac application from the makers of Voice Candy and Podcast Maker, analyzes track beats per minute (BPM) and compiles playlists based on the setting you choose -- creating a consistency in tempo perfect for, as the creator points out, working out. Of course what seems to be driving most of the excitement is the UI, which you can see here and below, analyzing my smaller iTunes library: Not only is this app representative of a larger trend in Mac-app development towards hot and unique interfaces, but it also continues the recent slew of releases that help you get more out of your existing music library. No doubt eventually we'll see similar types of tools for feeds, videos and friends, but for now, we'll stick with those that make listening a little tastier.Disclosure: Word has it people who blog about Tangerine get a free license when it's released. I'd be happy to get a license, but that's not why I chose to blog about it, though that has been a partial motivator in the past.