I've been using Winamp since back when it first premiered. Still the best. I really like its ability to play all old-school VG chipsets with one easy installation.
OldVersion.com has it...or you could use some torrent site for a cracked version. I use MMJB, too - it has the best library organization of any player (IMO) with collapsible trees for artists that expand organized by album. The new Yahoo version doesn't have this library view as far as I could tell, so I'm sticking with this version for now. Here's the tree view that I'm talking about: ...and it also has a pretty cool "Album Art - Thumbnail" view:
I used to use Winamp, but when I reset my computer (like 3 or 4 years ago) I didnt download it, so now I use Windows Media Player