Audio

• MP3 Sushi Server
  Network Jukebox and Radio broadcast station. (PPC)
  
• StreamRipperX
  Internet radio recorder. (PPC)
  
• Audacity
   Audio editor. (PPC/x86)
• Ardour
  Digital audio workstation. (U)
• Play
  Play and manages audio files. (U)
• nLyrics
  iTunes controller & companion. (U)
• iRATE radio
  Free and legal music. (PPC)
  
• Max
  Audio converter in over 20 compressed and uncompressed formats. (U)
  
• DeKstasy
   DJ audio mix. (PPC)
  
• Senuti
   Extracts music from iPod to Mac. (U)
  
•  Cog
  Audio player. (U)
  
• Tag
  Metadata editor for FLAC, Ogg Vorbis, Monkey's Audio & WavPack files. (U)
  
• iPodDisk
  Copying music off your iPod. (PPC)

• iShout
  MP3 Stream player and recorder internet radios. (PPC)

• LilyPond
  Music notation program. (PPC/x86)
• OpenSong
  Manage lyrics, chords, lead sheets, overheads and computer projection. (U)
• Get Lyrical
  Adds lyrics to songs in iTunes. (U)
• AriaMaestosa
  Midi tracker/editor. (PPC)
• Señor Staff
  Music composition and MIDI playback. (U)
  
• Songbird
  Jukebox and media player (PPC/x86)
• XLD -  X Lossless Decoder
  

  Lossless audio decoder. (U)
  

Links

• Apple-Downloads-UNIX & Open Source
  Apple UNIX & Open Source download page.
• opensourcemac [nothickmanuals.info]
  List of open-source software for Mac OS X.
  
• Opensourcemac.org
  A simple list of free, open-source software for Mac OS X.
• Hyperjeff.net
  List of OS X Applications Open Source filtered.