OpenZFS on Windows
It seems that ZFS is most popular amongst Windows administrators looking for something they feel is lacking from Microsoft's ecosystem but this often sends them into the arms of FreeNAS or other projects that tout ZFS ease of use. However, ZFS is available now on Windows and is mostly complete. It's early to know if this will get any use and continued development, but if you are a Windows user wanting ZFS, it is worth a look.
Could be interesting.