CTFs as you need them
Tool for managing a kendo tournament
Tugeny is a tournament organization software.
Pairing software for round-robin tournament (Schurig table)
Football/Soccer Leagues Manager
Web application for online score keeping of Ultimate events
Software to help people run and organize tournaments.
Software for tournaments
Tournament Generator Application (GT)
The Free Online Multiplayer Hacking Platform Shooter
manage chess game data in joomla
A very simple program for tournament scheduling (football...).