Ask Slashdot: Best FLOSS iTunes Replacement In 2013?

First time accepted submitter cs80 writes "I've been looking high and low for a decent, open-source, cross-platform audio player that can import an existing iTunes library and sort my files based on their ID3 tags. Nightingale, with its iTunes-like interface, would have been the obvious answer, but its file organization feature was pulled for being too buggy. What open-source audio player did you migrate to after dumping iTunes?"