Isometrica - 3D illustration constructor with 380+ isometric objects
Characterz - Biggest diverse mix and match 3D illustration library
H A N D Z - Free 3D illustrations of diverse hands gestures
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers
Handy 3D Hands - Exceptionally fun 3D illustrations by Icons8
Free 3D Slam Illustrations - Virtual reality gadgets are embodied in volumetric graphics