Official Raspberry Pi Quick start guide offers to download and use NOOBS – New Out Of Box Software.
It includes Raspbian, Pidora and two flavours of XBMC.
On Raspberry Pi Downloads page we can also find raw images of Raspbian, Pidora, RaspBMC, OpenELEC, RISC OS and Arch Linux.
All of this systems based on Linux except RISC OS.
I have a big experience with Unix, primarily with BSD. And I like it more than Linux.
I tried to run FreeBSD on Raspberry Pi and it was easy.
There are a lot of materials about Raspbian.
Books about Raspberry Pi usually say about Raspbian.
But there is practically no information about FreeBSD on Raspberry Pi.
That’s why I decide to write about it.
Getting FreeBSD for Raspberry Pi
There are some official FreeBSD binary distributions for ARM platform.
You can find it here.
There are FreeBSD-10.0-RELEASE and some FreeBSD-10.0-STABLE images.
I use last stable image.
After downloading and uncompressing it you should write it on SD card as usually.