Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs
Device Shots - Generate high-resolution device mockups using a screenshot.
Control Illustrations - 108 free flat illustrations with customizable characters
Facebook Design - Devices - Images and Sketch files of popular devices.
Humaaans - Mix-&-match illustrations of humans with a design library.
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.