Yard is a suite of Perl scripts for creating custom boot/rescue/Linux-on-a-floppy disks. You specify a basic set of files and utilities for inclusion and Yard handles the details, including checking for errors, omissions and inconsistencies.
The FreeBIOS project aims to provide a replacement for any computer's firmware, and support advanced or custom features and configurations. Initial code supports Intel-based only, but other processors and chipsets will be supported.