fre:ac is a free audio converter and CD ripper/audio CD grabber with support for various popular formats and encoders. It currently converts between MP3, MP4/M4A, WMA, Ogg Vorbis, ...
Stereo Tool is a free Winamp plugin that can manipulate sounds. It contains a powerful stereo image manipulator, an 8-band multiband compressor/limiter and a singleband compressor/ ...