UI8 - Carefully crafted UI design assets
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Handsome Illustrations - Create unique illustrations for websites & applications.
Control Illustrations - 108 free flat illustrations with customizable characters
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs
Humaaans - Mix-&-match illustrations of humans with a design library.