Streamripper
StreamripperX
FreeRecord streaming MP3 audio from Shoutcast, Icecast, and other Internet radio systems.
Mac
Streamripper for Winamp 2 and 5
FreeStreamripper: Download Streaming Music Directly to Your Drive
Windows
Streamripper for Linux
FreeRecords shoutcast compatible streams on your Linux system.
LinuxStreamRipper32
FreeStreamRipper Records Streaming MP3s Efficiently
Windows