I spent an unreasonable amount of time porting software that is generally run on Linux and Mac OS X to RedHat (mostly because their fork of Linux appears to be

I spent an unreasonable amount of time porting software that is generally run on Linux and Mac OS X to RedHat (mostly because their fork of Linux appears to be a museum of obsolete libraries). The BSD forks are often quite interesting in their goals. Some of the Linux ones are as well. There are so many more Linux forks than BSD forks though.