[[
CORRECTION:
It is not a boot loader, is a few bash shell scripts, that calls the efibootmgr to configure UEFI with Linux kernel, presuming a Ubuntu-based system.
I should have read the code before calling the code a boot loader. Mea culpa.
]]
UEFI-Boot is a new UEFI-centric, Linux-centric bootloader that lets you “Boot Linux directly from UEFI firmware (without any bootloader)”:
UEFI Boot – is a small and simple project aimed to organize the loading of linux kernel via UEFI firmware (without any bootloader). The synchronization of UEFI boot options with installed kernel versions is triggered via /etc/kernel/postinst.d and /etc/kernel/postrm.d kernel triggers.
Firmware Security 