FLAC - A free, open source codec for lossless audio compression and decompression
Monkey's Audio (.APE) - Monkey’s Audio makes perfect, bit-for-bit copies of your music, exactly the same as the original. You can decompress your lossless .APE files back to the original files. Think of it as a beefed-up Winzip™ to perfectly recreate the original music CD.
Opus Interactive Audio Codec - Opus is a totally open, royalty-free, highly versatile audio codec.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Vorbis - Ogg Vorbis is a fully open, general-purpose compressed audio format for mid to high quality...
G-Stomper Studio - G-Stomper Studio is a feature-packed, mobile music production tool.