What are all the Identicon frameworks available to developers?

Question

Identicons are those icons based on a user IP or name or so which provide an automated avatar... just like the avatar icon on StackOverflow. Here are some available systems (hat tip to Roger Browne):

• http://haacked.com/archive/2007/01/22/Identicons_as_Visual_Fingerprints.aspx
• http://digitalconsumption.com/forum/Visiglyphs-for-IP-visualisation
• http://www.shamusyoung.com/twentysidedtale/?p=1462
• http://turnyournameintoaface.com/ [didn't provide an API for this, but considering generated pics are gender specific...]
• http://scott.sherrillmix.com/blog/blogger/wp_monsterid/

Are there more?

Answer 1

I believe SO uses Gravatars