Clementine is a great multi-platform open-source clone of Amarok 1.4.x. A little different from the old Winamp/XMMS "tape deck" feel, but very responsive and light with many modern features.
I use to love Amarok back in the 1.4.x days, but after Amarok messed everything up with 2.0, I swore it off and wrote my own XMMS2 client. Clementine wasn't out yet and I decided that the only way to get something that I wouldn't hate would be to write it myself.
These days I just use zsh and mplayer though. Apparently all of my use-cases sum up to "play one or more albums, perhaps shuffling them first". I've given Clementine a shot, and it is quite like Amarok use to be, but now it all seems like clutter.