Avatar SDK - AI-powered 3D avatars from one photo
Humaaans - Mix-&-match illustrations of humans with a design library.
Boring Avatars - JavaScript library to generates SVG avatars based on text.
Avataaars - Mix and match avatars with a Sketch library
100 Free Userpics - Collection of a hundred free userpics especially for your design projects.
Sketch Icons - Generate a dynamic icon library in less than 5 minutes