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.
H A N D Z - Free 3D illustrations of diverse hands gestures
Mr. Mockup - Mr.
Characterz - Biggest diverse mix and match 3D illustration library
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.
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers