NukeLadder is a addon pack for versions of PhpNuke, CPGNuke, PlatinumNuke, IPBNuke and possibly others.
Nukeladder lets you run multiple competitions for multiple games.
What kind of competitions? Well, Nukeladder now includes its of mods directory where you can load different types of competition. Adding new competition formats is easy, and more are currently being worked on. Current formats include, league , ladder and knockout.(more below)
This flexibility lets you run different types of competitions all at the same time, with the same script, same teams, and players.