Winamp
The most famous player in the world surely.
It has an equalizer, different skins and visualizations

About Winamp:
- Recommend for primer
- Easy to use
- Easy install

Details:

- Freeware
- Website: http://www.winamp.com

- Download Free

Sonique
Additional functionality includes a full-featured playlist editor, a variety of unique output visualization modes via plug-ins. It supports many audio formats, including MP3, MP2, OGG, WAV, MOD, XM, IT, S3M, and CD audio and all Windows Media audio formats.

About Sonique:

- Full-featured playlist editor. 
- Good Help System. 
- Many skins. 
- Equipped with our own AE4 Mpeg Audio Decoder. 
- Direct access to the Sonique music distribution site. 
- Many audio controls (20 band equalizer, balance, pitch etc). 
- Dynamic windowless interface design. 

Details:

- Freeware
- Website: http://www.sonique.com

- Get Sonique

Quintessential Player
- Full Speed CD Ripping
- Crossfading help-system
- Skins and Plug-ins help-system
- MP3 Encoding for free
- Multiple visualizations 
- Streaming audio help-system
- MP3, Ogg, WAV, and CD support
- Powerful Tag Editor
- It's Freeware! 

Details:

- Website: http://www.quinnware.com

- Get Quintessential Player