SeaBios is described as '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'. There are five alternatives to SeaBios for Linux and Windows. The best alternative is coreboot, which is both free and Open Source. Other great apps like SeaBios are Libreboot (Free, Open Source), U-Boot (Free), petitboot (Free, Open Source) and XTIDE Universal BIOS (Free, Open Source).