foobar2000
As much as I love skinning my multimedia players, there's something to be said for efficiency. Peter Pawlowski, a veteran of the Winamp team scales back all the bloat with this media player offering resembling something that looks like it should have debuted back in the days of Windows 95. foobar2000 runs with a minimal amount of memory usage, producing a big white window for you to view your playlist while choosing from a feature list that would put some of the more well known media players to shame. While I wouldn't consider this app ready for primetime, it runs without a hitch. If you need to conserve on RAM, you can't go wrong replacing your current media player with foobar2000.