Pysox is an open-source library for the development of isometric, 3D games (RTS and TBS chiefly). It will be scriptable in either Python or Lua. It is written in Objective-C using GNUstep, OpenGL, and SDL.
Wyvern is a console tool to make text adventures. It is programmed in C, and developed for Windows and Unix-like operating systems. Official site currently @: http://www.jonathantoddskinner/wyvern.html