LameXP - LameXP is an Audio Encoder Front-End, a graphical user-interface for a number of audio encoders.
FLAC - A free, open source codec for lossless audio compression and decompression
FLAC Frontend - [No longer maintained, but downloadable]
WavPack - WavPack is a completely open audio compression format providing lossless, high-quality lossy, and a...
wxLame - wxLame is a free front-end for the LAME MP3 encoder.
Vocal Extractor - Vocal Extractor- Karaoke Maker (iPhone) is an app that allows you to separate karaoke and vocals from a song or audio file.