Barebox

Barebox is a primary boot loader used in embedded devices. It is free software under the GPL-2.0-only license. It is available for a number of different computer architectures, including ARM, x86, MIPS and RISC-V.

History
The Barebox project began in July 2007 as u-boot-v2, as it was derived from Das U-Boot, but with heavier borrowings from Linux like similar utilities and with a more Linux-like coding style.