In our Freeware Page we have posted a review about MusikCube, the most powerful competitor to iTunes. It is superfluous to remind that this opensource software has exactly the same features than iTunes (e.g. tags and dynamic playlist), personally I prefer to underline that MusikCube is extremely lightweight (12,792K on my XP), fast (due to the sqlite database engine), compact and easy to use (it has also a good integrated CD ripper) . Unfortunately it is not possible to personalize (or create) the skin but there are more than 20 plugins you can choose between. Moreover I tried to connect my IPod but I did not succeed; with Zen and Rio I had not any problem. To conclude, I suggest MusikCube to all people who are loking for a modern mp3player with a terrific integrated library manager!
MusikCube: the opensource competitor to iTunes