Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Humaaans - Mix-&-match illustrations of humans with a design library.
Anthony Boyd Graphics - Anthony Boyd Graphics is the fastest-growing platform that offers high-quality and advanced level mockups, textures, 3D models, and UI kits for free to help designers to save time and effort.
Control Illustrations - 108 free flat illustrations with customizable characters
Mockups Design - Mockups Design is the most leading web-based application that comes with a vast collection of creatively design mockups for all kinds of products and devices.
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs