• Port of ZFS on Linux
• alpha, developer preview – please use only with test pools
• for use with Mac OS X 10.6 – OS X 10.9

• primary focus on command line compatibility
• issues involving GUIs (Finder, Time Machine etc.) may be deferred
• not yet tested with Darwin – might need slight compile tweaks
• occasional disk images at http://lundman.net/ftp/osx.zfs/
• when ZFS-OSX becomes stable it will be the preferred stable version of MacZFS.

• General purpose GNU distribution for amd64/i386
• Uses the FreeBSD kernel, which provides an OpenZFS implementation
• An official Debian release, still using GNU libc and with ninety percent of the same software packages available
• wheezy stable release:
  • able to dual-boot 9.0 (default) or 8.3 kernels of FreeBSD
  • zpool version 28 (deduplication, raidz3, removable log devices)
  • still lacks support for ashift=, and important development tools like DTrace
  • installer supports creation of zpools, installing to them, and booting directly from them with GRUB2
• testing release will be updated with new FreeBSD kernel releases, gaining many OpenZFS enhancements, including support for lz4 compression

• General purpose server OS
• download
• browse ZFS source code in github or websvn or OpenGrok

• Workstation/desktop OS
• commercial support available from ixSystems.

The illumos codebase is the foundation for various distributions – comparable to the relationship between the Linux kernel and Linux distributions.

• Forked from the OpenSolaris codebase in 2010
• browse ZFS source code in opengrok or github

• General purpose server OS
• download
• source code
• commercial support available from OmniTI.

• Gentoo provides first-party ZFS on Linux packages to itself and its derivatives.
• Derivatives include:
  

• Implemented in the kernel
• maintained in an independent code repository (not the mainline kernel)
• provides self-building packages for Debian, Fedora, RHEL/CentOS/SL, Ubuntu and build instructions for several other distributions.