canoeboot.org
Canoeboot is a free/libre coreboot distribution providing BIOS/UEFI boot firmware for specific Intel/AMD x86 and ARM motherboards. It initialises hardware and starts a bootloader, offering GRUB, SeaBIOS and U-Boot payloads in a single image with a choice at boot time. Linux and BSD are supported. It removes binary blobs from coreboot, including CPU microcode updates.