Gpart is a small tool which tries to guess which partitions are on a PC harddisk in case the primary partition table was damaged. It works by scanning through the device (or file) given on the commandline on a sector basis. Each guessing module is asked if it thinks a filesystem it knows about could start at a given sector. Several filesystem guessing modules are built in, and others can be added dynamically.
Grml is a live system (live CD) based on Debian. It includes a collection of GNU/Linux software especially for system administrators and users of texttools. It provides automatic hardware detection and its default shell is the zsh. You can use it e.g. as a rescue system, for analyzing systems/networks, or as a working environment. It is not necessary to install anything to a hard disk; you don't even need a hard disk to run it. Due to on-the-fly decompression, it includes more than 2 GB of software and documentation on the CD.
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.
jared (just another registry editor) is a Java library for editing the Windows registry. It reads a registry file into memory and allows modifications and rewriting of the file. It also contains a command line program for mods using a .reg file. The code supports gcj. jared is particularly appropriate for modifying or analyzing registry hives offline.
kmp_search is an extremely fast exact string search utility that can be used to search for exact strings or patterns in binary and text files and devices. It can search for multiple strings concurrently, but is much faster when searching for strings one-by-one. The starting byte offset of each match is reported to stdout. Because it is extremely fast, it can be used in a data recovery process after a multi-gigabyte file system crash. The Knuth-Morris-Pratt algorithm is used for the search, which gives a total time of O(file length + pattern length).
m23 is a software deployment system for Debian GNU/Linux that allows you to install and administrate hundreds of clients via network. It can partition and format clients and install Debian, (K/X)Ubuntu, Linux Mint, Fedora, OpenSuse, and CentOS operating systems on your virtual and physical clients. Group functions allow the comfortable update and installation of further packages during operation. Mass installation functions simplify your administration chores. m23 has a Web interface. Backup functions are implemented for server and clients.