Humaaans - Mix-&-match illustrations of humans with a design library.
Boring Avatars - JavaScript library to generates SVG avatars based on text.
Avataaars Generator - A simple avatar generator
Union Avatars - 3D Realistic Avatar Maker with a single selfie
AVATARZ - Lovely library of diverse 3D avatars
Peeps: 3D Avatar Maker - Peeps is an interactive 3D avatar maker.