gBootRoot makes the construction and development of distributions fun and simple with its Root Methods (Yard) and user-mode-linux test bed. Finish the product with a Boot Method (2-disk compression supported). Normal (non-root) users can make root filesystems and boot disks. It includes the make_debian script to create a testable user-mode-linux base Debian system, add-ons to enhance methods, and an MTD Emulator useful for running distributions made with the jffs/jffs2 filesystem.
SuperRescue is a single very large bootable system-on-a-disk. It's based on the observation that the vast majority of systems allow you to do so much more than the minimal system. Therefore, it isn't for everything, but for most desktop systems, it provides a much nicer rescue environment than your average rescue floppy. It requires an i386 PC with 24 MB of RAM and a bootable CD-ROM. PCMCIA support is implemented but somewhat limited. It is based on RedHat 7. (Version 1 is based on RedHat 6.)
SystemImager automates the installation of Linux to masses of similar machines. Software distribution, configuration, and operating system updates are made easy, including updates from one Linux release to another. It can also be used for content distribution on Web servers. It is most useful in environments with large numbers of identical machines. Some typical environments include Internet server farms, high performance clusters, computer labs, and corporate desktop environments where all workstations have the same basic hardware configuration.