fsprotect is a set of scripts that combine tmpfs and aufs to make existing filesystems immutable. After the filesystems are protected, everything that is written will be lost when the computer powers off. It is a great tool for testing and for public computers like those in schools, libraries, etc. It is also very easy to use. It is currently available only for Debian-based systems.
Boscli is a framework to create interactive command line interfaces. It is meant to help developers write interactive shells for domain specific tasks. It provides an easy way to wrap and join together command line apps and utilities and create specific shells with security levels and modes, history, auto-completion, and so on. Using this framework any developer can build an interactive command line interface for configuration or monitor an appliance in a few minutes. Boscli can be used as a "glue code" for an appliance's interface or to create a "homogeneous" administration interface for different systems and applications.
sfre (system flight recorder editor) is a script that wraps a text editor or any arbitrary command and implements logging, file locking, and change tracking for the command executed. It is meant for helping system administrators manage a system in tandem without interfering with each other.
Print Release System provides Web-based management of System V printing. It sits between Samba and the System V printing system. It ought to be relatively easy to make it work with other printing systems. After the job is printed, the user needs to consult a Web page that shows their queued jobs, which can be selected and released for printing (or canceled). A record is maintained for each job and, once the user reaches a quota, they can't release any further jobs to the printer.