- Free Lossless Audio Codec - FLAC
- Free and open source. See: FLAC. For additional information on FLAC, see the details provided in Wikipedia
- Monkey's Audio - APE
- Free and open source. See: Monkey's Audio.
- OptimFROG - OFR
- Not open source. See: OptimFROG.
- True Audio Lossless - TTA
- Free and open source. See: True Audio. For additional information see: Wikipedia.
- WavPack Lossless - wv
- Free and open source. See: WavPack. For additional information see: Wikipedia.
- Windows Media Lossless - WMAL
- See: WMA.