mpc123 is a command-line player for the Musepack audio compression format (MPC).

Perdition allows users to connect to a content-free POP3 or IMAP4 server that will redirect them to their real POP3 or IMAP4 server. This enables mail retrieval for a domain to be split across multiple backend servers on a per user basis. This can also be used to as a POP3 or IMAP4 proxy especially in firewall applications. Perdition supports arbitrary library based map access to determine the server for a user. POSIX Regular Expression, GDBM, Berkeley DB, MySQL, PostgreSQL, ODBC and LDAP libraries ship with the distribution.

Pngnq is a tool for quantizing 32-bit RGBA PNG images to 8-bit RGBA palette PNG. It's is an adaptation by Stuart Coyle of Greg Roelf's pnqquant. While pngquant uses a median cut algorithm, Pngnq uses Anthony Dekker's neuquant algorithm (http://members.ozemail.com.au/~dekker/NEUQUANT.HTML), generally resulting in better looking results than pngquant.

tio is a serial device tool which features a straightforward command-line and configuration file interface to easily connect to serial TTY devices for basic I/O operations.

WMBiff is an WindowMaker docking utility, that displays the number of read and unread messages in (usually) five mailboxes. You can also define actions to execute on new mail arrival (for example, play a sound file), [auto]fetchmail from a remote server, execute your mail reader with a mouse click, or list subject lines from unread messages.

Gyoto is a framework for computing geodesics in curved space-times. The gyoto utility program uses this framework to compute images of astronomical objects in the vicinity of compact objects (e.g. black-holes). Such images are distorted by strong gravitational lensing. The gyoto program takes a scenery description in XML format, computes this scenery using relativistic ray-tracing, and saves the result in FITS format.