Powertweak-Linux is a tool to tune your system to its optimal performance settings. It started life as the replacement for the now obsolete kernel option 'tune PCI bridges', and has been extended to provide more features and support more chipsets. It can also tune network/filesystem performance using /proc/sys entries, disk elevator settings, and x86 CPU registers (needs 2.2.18 or 2.4.0test kernel), CDROM speeds, hdparm type features, and Sony VAIO backlight. It has both a GTK GUI and a text-based lister.
gitty-gitty, the (general | GNU) template generation tools, are a set of scripts for creating a whole set of sources which may already be compiled and installed using the GNU development tools. Think of gtgt as a program which is able to create an already compilable, very sophisticated "hello world" program, written in C or C++ and constituted by a main program, two internal modules (classes), and one static and one shared library, and this complex "Hello World" is already fully embedded into the GNU autoconf/automake development environment. By using gitty-gitty, you will get a template of sources for the main cases you might meet, and which you can also use as examples for automake, autoconf, etc.
Slackpkg is an automated package-management tool for Slackware Linux. It can do tasks such as automatic downloading and installing or upgrading, browse the MANIFEST.gz (Slackware package-contents guide), and more. Dependencies are not automatically handled. It is not a replacement for pkgtool, but a valuable add-on.
TrinityOS is a step-by-step, example-driven HOWTO on building a very functional Linux box with strong security in mind. TrinityOS is well known for its strong packet firewall ruleset, Chrooted and Split DNS (v9 and v8), secured Sendmail (8.x), Linux PPTP, Serial consoles and Reverse TELNET, DHCPd, SSHd, UPSes, system performance tuning, the automated TrinityOS-Security implementation scripts, and much more.
Ivman is a flexible userspace volume manager for Linux. Originally an automounter, it can also be used to run arbitrary commands when certain devices are added to or removed from the system, when properties on existing devices change, or when devices emit conditions. Unlike gnome-volume-manager, it runs from a console. It uses D-BUS and HAL to listen for new devices, and uses pmount for mounting.