Amacdys is a single disk operating system based on the Linux kernel designed to play MP3 CDs.
Based on NetBSD, it allows easy replication of disk images for a wide array of OSes.
A system for constructing bootable "rescue floppies."
Includes a FreeBSD -based floppy that can be used to help deal with recovery of a system that has decided to seriously misbehave.
This is a Knoppix / Debian derivative that implements a Linux-based router and firewall, where software is loaded off a CD-ROM, and hence making it tamper-proof, and configuration is loaded from a floppy.
Based on a consolidation of efforts from OpenZaurus, OpenEmbedded, and OpenSIMpad projects, this runs on a number of portable devices. See also Angstrom Distribution