Futbol is a realistic soccer plugin for Bukkit using the BattleArena API. Players can left-click and "kick" an item or "ball" into a goal to score points. After a team scores a goal they will not be able to kick the ball for a configurable amount of time, or until the opposing team touches/kicks the ball. The team with the highest score at the end of the time limit wins. Rewards can be given to the winning and losing teams. Players can form teams, and even join tournaments. If the arena is in use, the players are kept in the queue and will join when one opens up. Server admin have the option of using BattleTracker to track win:loss records.
Source is on GitHub.