Here is a list of all Tournament organiser software that I have managed to track down. The key distinguishing factor between these software packages and Tournament Director for Windows is that Tournament Director for Windows is specifically designed to work with ECF grading and pairing system.

Pairing Software Comparison
A brief comparison of Swiss Perfect, Swiss-Sys, and Windows TD.

Tournament organiser software

Chess Club Manager
A multifaceted tool that handles virtually every aspect of running your school chess club.

Chess Pairing Program
A free Windows-based program that has been used for big school competitions over a number of years. It is also available in Swedish.

Sevilla
A Windows tournament management program for Chess and other sports. Supports various tournament systems, like round robin, swiss, Keizer, and TPR.

SSOS
An open-source pairing program. Offers source downloads.

Swiss manager
An administration and pairing program for chess tournaments (round robin, team-round robin, swiss-system, team swiss-system tournaments)

Swiss Perfect
Commercial program for Swiss and round robin tournaments - pairing, rating, and other features.

Swiss-Sys
Pairing software for swiss system and round robin tournaments.

TwinFeats Software Simple Swiss Pairing Engine
Java source code for simple swiss pairing engine

Vega
Swiss program designed to manage pairing. Includes screenshots, downloads, and documentation.

Windows TD
Commercial software for pairing swiss and round robin tournaments.

The World Chess Links web site contains links to non-English based Tournament Management software.