Handsome Illustrations - Create unique illustrations for websites & applications.
Control Illustrations - 108 free flat illustrations with customizable characters
Free illustrations - Find free to use illustrations & vectors
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs
Doodle Ipsum - Doodle Ipsum is a free illustration tool for devs powered by Blush!
Humaaans - Mix-&-match illustrations of humans with a design library.