How-To Geek

adjust sound volume of mp3 files : MP3Gain
backup a midi file : MIDI Backup Utility
burn an audio CD : Easy Burning
burn an audio CD : cdrtfe
burn an audio CD : jCDWriter
copy an audio CD : CDRDAO
correct/edit tags of mp3 files : Mp3 Tag Tools
correct/edit tags of mp3 files : MP3 Book Helper
correct/edit tags of mp3 files : MusicBrainz Tagger!
correct/edit tags of mp3 files : MP3-Info Extension
cut/edit/mix/record/remix sound files : Audacity
dj with the mp3 collection : Mixxx
manage CD collection : Ant Movie Catalog
mix audio files : Mixere
play an audio file : Coolplayer
play an audio file : LongPlayer
play an audio file : SnackAmp
play an audio file : NotifyCD
play an audio file : musikCube
play an audio file : Delphamp
play an audio file : Zinf
record save/ audio/video from screen : Krut Computer Recorder
record/save an internet audio broadcast : Juice
record/save streaming music : ASFRecorder
record/save streaming music : Streamripper for Winamp
record/save streaming music : StationRipper
rip music from a CD : MediaCoder
rip music from a CD : CDex
rip music from a CD : CD-DA X-Tractor
sequence midi files : JAZZ++
split an mp3 file into smaller parts : Mp3splt
split an mp3 file into smaller parts : split3pm
stream audio files on the web : GNUMP3d
stream audio files on the web : PeerCast
tag and upload creative commons audio : ccPublisher
turn PC into a media center : MediaPortal
update firmware on mp3 device : Rockbox
wrap mutiple mp3 files into one playable album file : Alba
wrap mutiple mp3 files into one playable album file : Mp3Wrap

Zig hard at work here =D. Perhaps The Geek should add an edit post function.

Nah plenty of forums let you edit posts long after it has been replied to. BTW this is a very very useful list. Thanks Zig.