Gentoo Category Select is a graphical tool for selecting Gentoo Package Categories to exclude from your local package repository.
It does so by weaning information from multiple directories and files for convenience, as well as providing warning about categories that should not be excluded due to currently installed packages.
This is achieved without the addition of a configuration file. Currently only the Qt front-end is finished. It is modularly designed for ease in creating front-ends based on other toolkits.
The advantages are saved disk space (small/MMV), quicker rsync time (small/MMV), and a lessening of bandwidth requirements by gentoo.org and its mirrors.