In Assassin of the Underdark, you take a custom player character through the underdark. RPG elements are included in the form of weaponry, items, and spells. There are scripts to print Python character files, resource management, and a widget system. A plugins directory is loaded at program start, and there's a Python shell window widget for testing out scripts.
Pybik is an interactive, graphical, single player puzzle about the cube invented by Ernő Rubik. Besides the cube, the program can handle towers and bricks (non-cubic puzzles). Pybik also has solvers, pretty patterns, and a collection of various moves. The cube can be manipulated with the mouse or keyboard. You can change the colors or images on the faces of the cube.
Gameclock is a fairly simple application designed to track the time spent thinking by the players during a chess game. Various clock engines are available (speed chess, fisher chess, board games, or hourglass). The graphical interface is keyboard-driven and is intended to be minimal and simple. The code is made to be extensible to other game types.