EveryMac.com - EveryMac.com is an online website that provides complete details about every iPad, iPhone, Mac, iPod, and Mac clone made by apple.
GRUB - Multiboot boot loader
Apple-History - Apple-History provides up-to-date information about every computer developed by Apple with descriptions, images, technical specifications, and more.
Clover EFI bootloader - This is EFI-based bootloader for BIOS-based computers created as a replacement to EDK2/Duet...
Mac of all trades - Mac of all trades allows you to buy cheap refurbished Apple Computers and Laptops at the Lowest Prices with a Free Warranty, which covers the product in case of damages.
U-Boot - Das U-Boot (the Universal Bootloader) and Embedded Linux