This short tutorial by user garyhall shows us how to get Raspberry Pi 2 running FreeBSD. Follow the link below for the full instructions.
Most Raspberry Pi’s run some form of Linux (Raspbian, Ubuntu, etc) but you can also run other Unix variants on the Raspberry Pi. Before I started using Linux in the mid 90’s I used FreeBSD – an extremely robust operating system. The good news is that Free BSD for Raspberry Pi is now available and I’ll talk you through how to install it.
First you’ll need to download the images for Raspberry Pi 2 Model B FreeBSD from here or download them from your command line as follows: …
Full tutorial: http://garyhall.org.uk/free-bsd-on-raspberry-pi.html