mpg321 is a clone of the popular mpg123 command-line mp3 player. It should function as a drop-in replacement for mpg123 in many cases. While some of the functionality of mpg123 is not yet implemented, mpg321 should function properly in most cases for most people, such as for frontends such as gqmpeg.

Pylint is a Python source code analyzer which looks for programming errors, helps enforcing a coding standard and sniffs for some code smells (as defined in Martin Fowler's Refactoring book)

The tracepath utility is similar to the traceroute utility, but also attempts to discover the MTU of the path. Supports IPv4 and IPv6.

TOIlet prints text using large characters made of smaller characters. It is similar in many ways to FIGlet with additional features such as Unicode handling, colour fonts, filters and various export formats.

CCAL is a drop in replacement for the standard unix calendar program. It includes support for color and daily, weekly, and yearly reminders/appointments.

OpenPref is open source implementation of European trick-taking game Preferans against two virtual players. Two alternative AI algorithms are available.