systemd is a system and service manager for Linux, compatible with SysV and LSB init scripts. It provides aggressive parallelization capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, keeps track of processes using Linux cgroups, supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can work as a drop-in replacement for sysvinit.
iPXE is a network boot firmware. It provides a full PXE implementation enhanced with additional features such as the ability to boot from a Web server using HTTP, and the ability to boot from a SAN using iSCSI, AoE, SRP, or FCoE. It supports a wide variety of network devices, including wireless and Infiniband networks. iPXE is an effective replacement for gPXE.
The Google Serial Graphics Adapter BIOS, or SGABIOS, provides a means for legacy x86 software to communicate with an attached serial console as if a video card were attached. It is designed to be inserted into a BIOS as an option ROM to provide over a serial port the display and input capabilities normally handled by a VGA adapter and a keyboard, and additionally provide hooks for logging displayed characters for later collection after an operating system boots. It is designed to handle all text mode output sent to the legacy video BIOS int 10h service routine. Int 10h is the most common method for displaying characters in 16-bit legacy x86 code.
grubinstall is a simple program with clear documentation to take the mystery out of the GRUB boot loader. It installs GRUB in an especially simple, robust, hard-to-screw-up form: in a dedicated contiguous boot area at the beginning of the boot disk. This is in contrast to the tools in the GRUB package, which get filesystems involved.
iloog is a Gentoo-based live CD targeted mainly at students and scientists. It features UnionFS filesystem support that enables you to write everywhere on the LiveCD and install extra packages, a graphical X environment through the Fluxbox window manager, many programming editors and IDEs, and a plethora of scientific applications, including Octave, Namd, Merlin, and full (La)TeX support.