Kernin is an easy-to-follow, menu-driven script to help with the installation of a Linux kernel. This includes everything from extracting the kernel from its tarball through automatically changing the LILO configuration. Kernin is mainly aimed at inexperienced users that have no prior knowledge of kernel installation. Kernin can also help experienced Linux users save time when installing a kernel. Note that kernin is only compatible with LILO at the moment.
apt-cacher is a CGI script which can be used by apt-get to request downloads of Debian packages (and release files) from the Net. Each downloaded file is cached into a directory, so subsequent requests for the same filename are filled from the cache. This is useful when you have multiple Debian installations to update, particularly if you are on the end of a slow Internet connection. apt-cacher is easy to install; you only need to have a local Web server on which you can place the CGI script and create a directory for the cache.
The poldek is an RPM package management tool which allows you to easily perform package verification, installation (including system installation from scratch), upgrading, and removal. Package dependencies are automatically handled, so if you try to install a package that needs others to be installed, it will download all needed packages and install them. It can be used in batch (like apt-get from Debian's APT) or interactive mode. The interactive mode puts you into a readline interface with commandline autocompletion and history, similar to the shell mode of Perl's CPAN.