I’ve been using Winamp for years.
Initially it was a very lean, quick and easy player for music, but after a couple of years of enhancements it just got abit too heavy on resources(still I use it sometimes). My current Winamp installation memory footprint is around 50MB, which may not sound alot but when developing and you need that last few megs, it makes a difference.
I read on someone’s blog about Foobar2000, which is a music player which is very light, has support for various audio formats and finally which is very light on memory, currently I’m running around 10MB, which is not too bad.
I’ve been using it just for a few days, and so far it is doing what I want with no problems or restrictions so far.