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.
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.
UPMS (Universal Package Managment System) is based on the BSD ports system, and can be used on any FHS 2.0 Linux-compatible distribution. UPMS has two level of dependencies checking: required and suggested. It also has an option to optimize everything that you build and install with it for your architecture.