The Open Source PL/SQL project is a collaborative effort by developers to create variety of Oracle packages - available free of charge. The purpose of each package varies, but all are developed based on a common set of coding standards for consistency.
...The aims of this project is to create easy to use tools to create worlds, terrains, and objects, with an easy to use Voxel editor, as well as provide an API for easy coding of most any style of strategy game one can think of.