Audio Audio Programs
Goldwave
Goldwave
Version: 3.03 Date: Jan, 1996
Description: An old but good music editor.
iTunes
iTunes
Version: 7.1.0.59 Date: Mar 2, 2007
Description: Apple's music player packs some great features, especially music-sharing and the revolutionary iTunes Music Store.

Consider adding the Multi-Plugin written by someone called localhost (you can find the plugin in the AquaSoft iTunes forum). This plugin can modify some aspects of iTunes, the coolest of which is changing the window title to reflect the currently playing song, so now you can see what's playing in iTunes just by looking at your Taskbar!

For more advanced iTunes control in Windows, try the iTunes widget for Kapsules. Or, try iTunesBar or Power Tunes, both of which are configs written by Atreide for Samurize. Or, install the iTunes docklet (also written by localhost, the author of Multi-Plugin) for ObjectDock (a windows version of the Mac OS X Dock). There is another ObjectDock docklet called SysStats for which someone has written an iTunes config. I can't get SysStats to work at all, though, so I can't test the iTunes config, but it looks like it would be nice!

Other cool add-ons for iTunes are iTC (a simple controller) and iArt (an artwork downloader, formerly known as iTunesCover).
Mod4Win
Mod4Win
Version: 2.3 Date: Oct, 1995
Description: MOD player.
MODPlug
MODPlug Player
Version: 1.4.3 Date: Aug 12, 2000
Description: Plays MOD and other tracked-music formats.
MP3TagTools
MP3TagTools
Version: 1.2.0.0 Date: Dec 21, 2002
Description: This isn't really an audio application - it's a tool to help manage your MP3 files' ID3 tags. I'm amazed by how many (legit) MP3s I download that don't have valid ID3 tags. C'mon, folks - label your MP3 files properly!
RealPlayer
RealPlayer
Version: 10.5 (build 6.0.12.1056) Date: 2004
Description: Real can't decide on the name of their Player (Player -> Jukebox -> One -> Player), but it's still a decent audio/video player. For regular MP3 playback, though, I prefer iTunes.
Sonique
Sonique
Version: 1.001 Date: Mar, 1999
Description: An unusual MP3 player.
MediaPlayer
Windows Media Player
Version: 11.0.5721.5145 Date: Oct 18, 2006
Description: Plays a variety of video and audio formats, but I hate the UI. Try iTunes or QuickTime!
WinAmp
WinAmp
Version: 2.80 Date: Apr 23, 2002
Description: The original, skin-able MP3 player.
Yamp
Yamp
Version: 2.1 Date: Nov, 1997
Description: Plays a ton of tracked-music files.

The information above represents my experience with a certain version of each piece of software. I have no vested interest in any of these programs, and only provide this info as a guide (your experience and preferences may vary greatly!).

The version number listed is the latest version I have tried. To download the latest version, click on the name or the icon of the program, which should take you to the program's homepage, or to a software archive site.