xz

XZ Utils is free general-purpose data compression software with high compression ratio. XZ Utils were written for POSIX-like systems, but also work on some not-so-POSIX systems. XZ Utils are the successor to LZMA Utils.

    The core of the XZ Utils compression code is based on LZMA SDK, but
    it has been modified quite a lot to be suitable for XZ Utils.  The
    primary compression algorithm is currently LZMA2, which is used
    inside the .xz container format.  With typical files, XZ Utils
    create 30 % smaller output than gzip and 15 % smaller output than
    bzip2.