Cheetah is a template engine and code generation tool, written in Python. Web development is its principle use, but Cheetah is very flexible and is also being used to generate C++ game code, Java, sql, form emails and even Python code.
CGI games:
WSpace will become a multiplayer space strategy game.
WebRogue is a roguelike, ready for multiplayer support later. There is also a GUI client for WebRogue in the download.