apt-sources
Automatically generates the sources.list file based on the fastest Debian mirrors. Downloads provided.
Aptitude
A highly configurable console front-end for Debian APT. Downloads and screenshots provided.
aptsamever
Lists or removes old duplicate versions of packages installed by apt-get. Downloads provided.
Creating Debian Linux packages
Describes the basics of creating Debian packages for distributing programs and source code. This article shows the necessary components of a package and how to put them together to end up with a final product.
Debfoster
Removes orphaned packages. Downloads and a brief tutorial provided.
deborphan
Checks for orphaned packages and removes them. Downloads and documentation provided.
Demish
Allows package mirror maintainers to choose which packages they want in their mirror. Downloads provided.