LuaXLL is a lightweight Lua interpreter built into a Excel XLL. The XLL has extensions built into it which allow new Excel functions to be defined in a Lua script and exposed to the main application with the XLL marshalling data across the environments. Its primary use is for rapid modelling and development. And it could also serve as an interface to more advanced models built in C. It has built-in support for ODBC databases (via LuaSQL) and some generic modeling functions (added as I need...
Wing is a modeling tool used for creating realistic natural landscape efficiently. More specifically, we try to proceduraly generate four key ingredients of nature ---- plants, terrain, water and weather, with simple but powerful user controls.