Tournament Software

Chess Pairing Program
A Windows-based program available in the Swedish. Has download.
http://home.swipnet.se/rullchef/chessp/

Free Java Swiss Pairing Application
Free swiss pairing application written in Java. Includes source code.
http://twinfeats.com/tf/twinfeats/Java/pairings/index.tfs

Sevilla
A Windows tournament management program for Chess and other sports. Supports various tournament systems, like Round Robin, Swiss, Keizer, and TPR.
http://home.wanadoo.nl/jphendriks/sevilla/

SSOS
An open-source pairing program. Offers source downloads.
http://www.idt.mdh.se/~csg/soss/index-en.html

Swiss Pairing Software Comparison
A brief comparison of Swiss Perfect, Swiss-Sys, and Windows TD
http://www.ioa.com/~hyde/pairing.htm

Swiss Perfect
Professional software for running tournaments.
http://www.swissperfect.com/

Swis-Sys
Pairing software for swiss system and round robin tournaments.
http://www.swisssys.com/

Tournament Director
A program for Swiss and round robin tournaments - pairing, rating, and reporting. Specifically designed for the BCF tournaments.
http://www.tournamentdirector.co.uk/

Vega
Swiss program designed to manage pairing. Includes screenshots, downloads, and documentation.
http://www.vegachess.com/

Windows TD
Commercial software for pairing Swiss and round robin tournaments.
http://www.estima.com/chess/