Craftwork - A collection of User Interface resources made by Craftwork
Humaaans - Mix-&-match illustrations of humans with a design library.
404 Illustrations - Open-source catchy illustrations for perfect error pages
Control Illustrations - 108 free flat illustrations with customizable characters
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs