Avatar SDK - AI-powered 3D avatars from one photo
Ready Player Me - Personal 3D avatars for Mozilla Hubs
Boring Avatars - JavaScript library to generates SVG avatars based on text.
EMOJIZ - Animated 3D emoji set with source files
100 Free Userpics - Collection of a hundred free userpics especially for your design projects.
Dollo - 300+ mix-and-match components to create your own avatar