Helps to organize duel tournaments. Consists of two parts: Player's and TO's (tournament organizer).
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Player part needs to automatically say to TO when duel is ended and for some info.
/dtp new - register a player
/dtp info - information about current points and duels.
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TO's part allows you to create a full swiss tournament.
/dtt list - show the list of players
/dtt flush - delete all data for players
/dtt dq <name> - disqualify player
"/dtt dq -" delete everything to start new tournament
/dtt pair - create pairings
/dtt apair - announce pairings to players
/dtt fprog - display who has not ended duels yet
Also this addon provides some info on a tournament situation.