ConsoleKit is a system daemon for tracking what users are logged into the system and how they interact with the computer (e.g. which keyboard and mouse they use).

phpCAS is an authentication library that allows PHP applications to easily authenticate users via a Central Authentication Service (CAS) server.

liba52 is a free library for decoding ATSC A/52 streams. The A/52 standard is used in a variety of applications, including digital television and DVD. It is also known as AC-3.

aespipe is an encryption tool that reads from standard input and writes to standard output. It uses the AES (Rijndael) cipher.

The mod_python module supports web applications written in Python. Because the parser is embedded in the server as an Apache module, it will run much faster than traditional CGI.