Nano9 for USB sticks and, or SD/MMC cards or a Plan9 LiveUSB, is nothing more than a FreeBSD-7.2 base, xorg-minimal and 9vx-hg, but is no less either :)
From the page: Still not sure what BitScope is? BitScope is a built and tested (and previously build it yourself DIY), open design, digital storage oscilloscope and logic analyzer (also, digital sampling oscilloscope, mixed signal oscilloscope).