Avatar SDK - AI-powered 3D avatars from one photo
100 Free Userpics - Collection of a hundred free userpics especially for your design projects.
Boring Avatars - JavaScript library to generates SVG avatars based on text.
Avataaars Generator - A simple avatar generator
Avatar Picker - User friendly, in-page avatar changes for your web app
Humaaans - Mix-&-match illustrations of humans with a design library.