RZM is an old compressor from 2008, but still it sometimes beats lzma in compression ratio.
Original compressor was released
here by the author of RAZOR Archiver. The original version doesn't support stdin/stdout.
Anyways, here I present rzm stdio patched version.
I patched and ran only three successful tests, so don't know if it is quite stable or not.
RZM doesn't support files over 2GB and is single threaded so use 4x4:b2047m:rzm to bypass the limit and make it multithreaded.