Community Gaming is described as '’s platform removes friction for tournament organizers to host tournaments and for gamers to compete and automatically get paid when they win'. There are seven alternatives to Community Gaming, not only websites but also apps for Android, iPhone, Android Tablet and iPad. The best alternative is Challonge, which is free. Other great sites and apps similar to Community Gaming are smash.gg (Free), BinaryBeast (Freemium), Matcherino (Freemium) and MTGMelee (Free Personal).
MTGMelee is a web service to organize and participate in Magic: The Gathering tournaments. It supports the following tournament structures: Swiss, single elimination, podded, round robin, four player free-for-all, and any combination of these structures.