Intellicubes are the latest examples of "open source" models. This means, well, that they can be modified (as in, remade/re-uploaded) by anyone. These are easily the the simplest examples of open source on the 3D warehouse. They are small cubes that are programmed to fly to anything with a name of "target". Even the target name can be modified to suit your needs. I also have a whole collection of them on the warehouse. That collection is constantly being changed, so keep looking at the collection for new cubes. I will also take requests from the general public as well. Just leave a comment in the collection's ratings section. I will try and process that request as soon as possible.