As of December 20th, AOL decided to stop all development on Winamp and related services, as well as shut down the sites hosting the downloads. I had saved all of the available files on that date to make them available afterwards as others have done. These files have not been altered in any way. I’m a big Winamp and Shoutcast fan myself.
Winamp 5.666 Full
SHOUTcast DSP Plug-In for Winamp
Windows (Requires Winamp 5.5+)