Nift (Network Intrusion Footprinting Tool) is graphical frontend (written in GTK+) for footprinting tools and methods already freely avaliable. Its purpose is to aid sysadmins in securing their site by allowing them to quickly check their network to see how much data can be gained by an attacker and used towards cracking their systems.
Terbidium (formerly 'Websource') is a Web portal like XOOPS, PHP-Nuke, and a million other portal-style sites. It can be used as a OOP framework for quickly building a new site, or as-is for a news portal system. It features basic user registration, authentication, and preferences system, several user-selectable themes, with templates for building more, site administration (Web-based) for all site features, session support, including hit tracking and reporting (for pages and ad banners), Web hit tracking, and more.
The Linux Bootdisk HOWTO describes how to design and build boot/root diskettes for Linux on the Intel platform. These disks can be used as rescue disks or to test new system components. You should be reasonably familiar with system administration tasks before attempting to build a bootdisk.