I built something similar a few months back [1][2]. Among other things, it accepts an arbitrary key, and will always generate the same avatar for the same key.

I built something similar a few months back [1][2]. Among other things, it accepts an arbitrary key, and will always generate the same avatar for the same key. Very handy for apps which need to generate user-specific avatars. [1]: https://github.com/monooso/avataraas https://github.com/monooso/avataraas [2]: https://github.com/monooso/avatar https://github.com/monooso/avatar