GPlayCD is a Gtk+ based CD player program for linux (I'd make it work on other platforms, but all I know how to support is the linux Unified CDrom Driver interface found in 2.2 kernels (and later 2.1 kernels)). It doesn't have many features, especially not yet, but it is small and with the gtk pixmap theme, I think that it looks good, or at least decent (note: this is mostly because I like the pixmap theme). It's nowhere near finished yet, but it is fully operational for eject, play/stop, pause/resume, advance/back, skip to an arbitrary track, displaying track #, displaying track time. I'm releasing it under the GNU GPL. A copy of the license is included in the file called COPYING, or can be gotten at http://www.gnu.org.