Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.

Device Shots - Generate high-resolution device mockups using a screenshot.

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.

Facebook Design - Devices - Images and Sketch files of popular devices.

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.

Pixeden - Pixeden is an all-in-one premium design and web resources platform that provides high-quality graphic design templates and lots of other files.