This is a pretty simple duels module, you start a duel by saying what players are dueling and then end it by saying which one is the winner. It has a ladder that you can configure editing the file how many points players will get upon winning or losing. Its pretty cool if I may say so :P and pretty simple, hope you like it
!duel start <player> <player>
Starts a duel.
!duel winner <player>
Ends a duel.
!duel cancel
Cancels a duel in progress.
!duel ladder
Shows top duelers.
!duel all
Shows latest duels.
!duel del <duel id>
Deletes a recorded duel.
!duel <duel id>
Shows info on a duel.
!duel notes <duel id> <notes>
Adds notes to a duel. (it will overwrite old notes)
!duel points
Shows your stats.
!duel show <player>
Shows duels for player.
edit: btw this is pretty much done, I dont know how the ign duel module works (never seen it), feel free to modify this and repost