I happen to consider Linux a "Unix Flavor" and pretty much anything I'm actively using (servers, desktops, phone, routers, ...) runs an OS that is Linux based.
I still have a complete ultrasparc system (but not in active use) running Sun Solaris and the core part of a Plexus computer running Sys 5.2 (an OS primarily based on ATT Unix SVR2, but with many useful BSD additions as was common in that era).
If this question included past use of Unix flavors, my list would be pretty long (having worked in software development and porting as part of my career).