Isometrica - 3D illustration constructor with 380+ isometric objects
Characterz - Biggest diverse mix and match 3D illustration library
Humaaans - Mix-&-match illustrations of humans with a design library.
Alter 3D illustrations - Explore a whole new world of 3D characters living in 2D illustrated backgrounds, this is a totally new style that is aiming to reduce the gap between 3D and flat design to create a better immersive design in websites and apps.
Handy 3D Hands - Exceptionally fun 3D illustrations by Icons8
3D Flame Illustrations by Icons8 - Eye-catching 3D illustrations for kick-ass designs