One of the best and most popular free MP3 players available on the web. Winamp is skinnable and also plays streamed video content. The newest features include a portable media player plug-in, which lets you synchronize your local media with iPod, Creative, and Microsoft Plays For Sure devices.
Media Monkey is a free media jukebox & music manager for serious music collectors. It has a CD Ripper supporting Freedb, CDs, WMA and OGG files. it has a built in audio converter for OGG, WMA, & MP3 conversion, a tag editor, a music playlist editor, a file renamer and more.
|dB Power Amp|
dBpowerAMP Audio Player is a free MP3 player with a crossfader for mixing tracks, skinning, visualizations, a built in music database, ID tag support, auto volume normalization, and more.
|Windows Media Player|
This is Microsoft's version of their free MP3 player. Windows Media Player will also play any type of media file. The software offers many customizable options and the ability to transfer your MP3 from your media player to your portable device.
Audacity is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems. While not a stand-alone MP3 player, it will allow you to mix your MP3s for unique mix tapes or whatever else you'd like to make.