Test::Fatal is an alternative to the popular Test::Exception. It does much less, but should allow greater flexibility in testing exception-throwing code with about the same amount of typing.

debsums can verify the integrity of installed package files against MD5 checksums installed by the package, or generated from a .deb archive.

NTP (Network Time Protocol) is used to keep computer clocks accurate by synchronizing them over the network or by following an accurate hardware receiver that interprets GPS, DCF-77 or similar time signals.

Pystache is Python implementation of Mustache. Original Mustache is a framework-agnostic, logic-free templating system inspired by ctemplate and et. Like ctemplate, Mustache "emphasizes separating logic from presentation: it is impossible to embed application logic in this template language."

This package is mandatory for building and running the qmail package.