I use foobar for playing music:

http://www.foobar2000.org/

and the godfather for tagging: (Looks like the official site is down now)

http://www.softpedia.com/get/Multimedia/Audio/Tag-Editors/The-GodFather.shtml
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Empeg Mk1 #00177, 2.00 final, hijack 4.76