At 99avatars.com you can manually create and download an avatar but there's also an API where you can request them for integrating it into a service. For example, giving new users their first individual face. More variety will be added shortly!
I build this out of personal need and interest and wanted to share it with the world. Who knows, maybe you find it useful!
For the future, more avatar-variation will be added, as well as more customisation through the API. Also thinking about better account management (anonymous tokens for now) where you can make sure to receive an unique avatar every time.
Also looking into collaborating with more creatively talented people for even more avatar-goodness!
Anyway, hope you check it out!
99avatars
Llamao
99avatars
99avatars