Libreboot is a free (libre) BIOS/UEFI replacement. Based on coreboot, the aim is to distribute low-level boot firmware that is 100% free software, and easy to use. Learn more
Libreboot has many practical advantages over proprietary boot firmware, such as faster boot speeds and better security; source audits are possible and, therefore, the firmware is unlikely to contain backdoors (common in proprietary firmware). You can install GNU/Linux with encrypted /boot/, verify GPG signatures on your kernel, write-protect the flash chip, run a full operating system directly from the flash chip (planned for a future release), and more.
Pre-configured libreboot systems are also available, from several commercial suppliers.
A list of high priority tasks can be found at docs/tasks.html.
Information about how libreboot is maintained, can be found at docs/maintain/index.html.