I like to point to The Tor BSD Diversity Project (TDP) which is an initiative seeking to extend the use of the BSD Unix in the Tor network.
They recently brought Tor Browser 7.0.5 to OpenBSD ports as a first step, then FreeBSD will follow.
There you can find also a FreeBSD Guide to Configuring Tor Relays with useful hints also for those not running a relay. I.e. they recommend using the security/tor-devel port because this one has the actual attention of the developers and the latest patches.
They recently brought Tor Browser 7.0.5 to OpenBSD ports as a first step, then FreeBSD will follow.
There you can find also a FreeBSD Guide to Configuring Tor Relays with useful hints also for those not running a relay. I.e. they recommend using the security/tor-devel port because this one has the actual attention of the developers and the latest patches.