Humanotion - Free avatar pack, perfect for Notion
Avatar Picker - User friendly, in-page avatar changes for your web app
Minimal Avatars - Create minimal, unique and playful avatars for free
100 Free Userpics - Collection of a hundred free userpics especially for your design projects.
Bottts - Mix & match robots with a Sketch library
Boring Avatars - JavaScript library to generates SVG avatars based on text.