Solaris


OpenSolaris 
https://en.wikipedia.org/wiki/OpenSolaris


illumos
https://en.wikipedia.org/wiki/Illumos
https://wiki.illumos.org/display/illumos/illumos+Home


OpenIndiana
https://en.wikipedia.org/wiki/OpenIndiana
https://www.openindiana.org


NexentaStor
https://en.wikipedia.org/wiki/NexentaStor
https://nexenta.com


SmartOS
https://en.wikipedia.org/wiki/SmartOS
https://www.joyent.com/smartos