This package allows the incorporation of Voxel based graphics (think Minecraft) into Unity. Use the OldSkool Designer to create Voxel models, then import them into Unity and instantiate them in your scene via drag and drop.. (see info.rtf)
The beauty of this system is that users of your game can create their own models and incorporate them in! Allow users to create furniture, characters and all sorts, and set up an ecosystem so that they can contribute their models for your gaming community to share..
Feedback and modifications: Google Code project.