Split2000 is a very obscure lossless compressor for Linux. As far as I can tell it was never ported to other operating systems. Actually, neither the sources not the precompiled binary available here seem to work, at least on recent Linux versions. So, unless someone takes the time to update the code, this codec can be considered completely dead.

Anyway, from what I understood of the readme and playing around with it, it is not a true lossless audio compressor, but it preprocesses the audio data and then feeds this preprocessed data into a generic data compressor - the default option is bzip2. This helps Split2000 achieve much better compression that the generic data compressor would achieve by itself, but even then, it is among the worst performing lossless compressors in RRW, coming close to ADA in my limited tests.

The encoder web page is gone, so I am mirroring it here.

Compression performance in my limited test: 66,25%


Date: 1998
Version: 1.0.0
Interface: Graphical or command line
Platform: Linux
Download: split2000.tar.gz - 113kB
Source code: split2000-1.0.0.tar.gz - 110kB

Thanks to Marco Pontello for submitting this codec.

Update:
Mr. Volodymyr Poltavets managed to adapt Split2000 to compile on recent Linux versions. He was kind enough to provide diff files and binaries that were compiled on Debian/unstable.
Very big thanks!
Download: split2000mod.tar.gz - 167kB.