WavPack lossless audio compression. Note that, when converting .wav to this format and back again, the RIFF header is not necessarily preserved losslessly (though the audio is).
is a standard for storing audio files in Apple operating systems. It was developed in 1988 based on the IFF format and is a lossless format - audio data is stored in an uncompressed form. In essence, AIFF is an analog to WAV for the Apple Macintosh platform.