Devana is an open source browser strategy game developed from the ground up (without any third party code) using OOP (Object Oriented Programming) code written in the MVC (Model View Controller) paradigm.
http://devana.eu/
http://www.facebook.com/DevanaGame
You can manage your team and you can play with other players. This game have 960 teams in 48 divisions. You can train your players, build your stadium and manage it, buy or sell players, build centre of youth, you have a staff, you can create cups