GeoIP is a C library that enables the user to find the country that any IP address or hostname originates from. It uses a file based database.

The Common UNIX Printing System (or CUPS(tm)) is a printing system and general replacement for lpd and the like. It supports the Internet Printing Protocol (IPP), and has its own filtering driver model for handling various document types.

isomd5sum is a set of utilities for implanting a MD5 checksum in an ISO (or any block device), then verifying the checksum later. isomd5sum is not simply an MD5 of the entire ISO; it checksums the data inside a standard ISO9660 image and write block checksum information to an ISO9660 header, that will carry over to burning the CD.

OpenArena is an open-source content package for the Quake III engine, effectively creating a free stand-alone game similar to Quake III Arena.

Automake is a tool for automatically generating `Makefile.in's from files called `Makefile.am'.