GRUB

GNU GRUB is a multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.

Free Open Source Mac OS X Windows Linux BSD OpenSolaris Solaris

PLoP Boot Manager

The PLoP Boot Manager is a small program to boot different operating systems. You can boot the operating systems from harddisk, floppy, CD/DVD or from USB.

Free Open Source Mac OS X Windows Linux

coreboot

coreboot is an extended firmware platform that delivers a lightning fast and secure boot experience on modern computers and embedded systems.

Free Open Source Linux

SeaBios

SeaBIOS is an open source implementation of a 16bit X86 BIOS. SeaBIOS can run in an emulator or it can run natively on X86 hardware with the use of coreboot.

Free Open Source Mac OS X Windows Linux BSD Haiku

gummiboot

gummiboot is a simple UEFI boot manager which executes configured EFI images. The default entry is selected by a configured pattern (glob) or an on-screen menu. ...

Free Open Source Mac OS X Windows Linux BSD Chrome OS

Chimera

Chimera is a Hackintosh bootloader that merges the best features from various branches of Chameleon bootloader, into a new branch based on the latest Chameleon 2.0 RC5...

Free Open Source Mac OS X

U-Boot

The "Universal Bootloader" ("Das U-Boot") is a monitor program. Free Software: full source code under GPL hosted on SourceForge:...

Free Linux

XTIDE Universal BIOS

XTIDE Universal BIOS makes it possible to use modern large ATA hard disks or Compact Flash cards on old PC's. You can then enjoy quiet or noiseless drives with more...

Free Open Source Windows Linux