Free jQuery avatar Plugins
All the Free jQuery Plugins about 'avatar' are listed here.
GravaLay is a small jQuery plugin which loads and replaces the regular images (default avatar images) with configurable Gravatar avatars.
async-gravatar is a jQuery plugin that allows you to asynchronously replace placeholder images on your page with Gravatar avatar images to speed up page loading time.
ninjatar is a jQuery & Html5 canvas based avatar generator using Crypto-JS's MD5 JS library.