Diverse UI - Diverse representations of people for your mockups
Humaaans - Mix-&-match illustrations of humans with a design library.
nappy - Beautiful, high-res photos of black and brown people
Control Illustrations - 108 free flat illustrations with customizable characters
Mockupdated - Ethnically diverse mock-up templates for designers
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs