Canva also has support for creating mockups (https://www.canva.com/smartmockups https://www.canva.com/smartmockups, requires login). Though, this site seems to

Canva also has support for creating mockups (https://www.canva.com/smartmockups https://www.canva.com/smartmockups, requires login). Though, this site seems to have more features at a glance.