openDarkEngine is a from-scratch rewrite of the famous Dark Engine originally written by Looking Glass Studios. The engine was used in the Thief 1, Thief Gold, Thief 2, and System Shock 2 games. This rewrite is targeted at newer machines and should improve compatibility and give the games (and all the fan made material) a never ending life. It should also allow manipulation of the original data files.
Click'n'Drag is a Python module that introduces the "Plane" class, which extends PyGame's "Surface" functionality, offering a hierarchy of mouse-sensitive, draggable Surfaces that can be used as sprites, windows, icons, or other interactive elements. In addition, the clickndrag.gui module uses clickndrag to provide basic GUI elements like container, label, text box, option list, and button.
Fabula is a Python game engine suitable for adventure, role-playing, and strategy games and digital interactive storytelling. It offers a client-server architecture, an event-based protocol, multiplayer and networking capabilities, a multi-threaded server, an abstract, visualization-agnostic model of a game world, an asset manager, and a plugin system. Gameplay can be recorded and played back. The code is well documented and runs on Linux and MS Windows (it should work on OS X, too, but this has not yet been tested). Fabula can be used as a library to develop your own games. As an alternative, you can use the included Pygame-based graphical editor and the default game engine.
GammaMOO is a fork of the LambdaMOO server with numerous cleaned-up patches and modern MOO functionality. This currently includes multicore support, object caching and other acceleration features, enhanced file I/O, UTF support, new built-in data types, and stability improvements with 64-bit support in progress.
OSGET is a mobile game engine template based on the EMO framework, which uses the Squirrel scripting language to support Android and iOS. The template includes common gaming features such as an introductory splash page, changing between level scenes, integrated player control, physical behaviors such as velocity against gravitational force, object collision detection and handling, background scrolling, playing of different audio channels, event triggering at timeout intervals, level missions, final level missions with bosses, and score submission through HTTP. It is based on the MVC pattern.