This is a nice light alternative music player I found the other day, I really like it.
The main screen looks something like this:
(Click to enlarge)
It's got tons of themes preinstalled and you can make your own as well, if you don't like the look.
One of the main draws for me is that while maintaining a lot of the awesome features from, for example Winamp, it uses only about half the memory:
I'm guessing it uses a lot less than iTunes as well, but I didn't test that because I don't have iTunes installed.
It's got a compact player mode, which is nice if you don't want it in the way
And an even smaller mini player mode
It's a great player, I love how it looks and works. Surprisingly it was made in Visual Basic o.O (As far as I know)
It's got a ton of other features too, see them here:http://getmusicbee.com/features.html
From what I understand, MusicBee can even accept some plugins developed for Winamp with the inclusion of a certain .dll in the installation directory
I switched over from using Winamp to this, because winamp was buggy as fuck for me and took up a ton of resources. All those extra features are either available here as well, or I never used in Winamp. I like this player a LOT better