Bluetooth

I would think that that bluetooth game controllers would work normally (not including the Wiimote) I think maybe using some of the ouya code, you would be able to use the ouya controller as well. I think for anything else, you might have to figure out how to make them work with greenfoot yourself.

If you can find a general Java library that will work, then there's no inherent reason why that shouldn't work with Greenfoot. See https://code.google.com/p/wiimote-simple/ for wiimote's for instance. Note that a lot of these libraries require native components, or have other dependencies - in the case of the above, you'll need Bluecove and appropriate bluetooth drivers installed (as said on the project page.)