Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Isometrica - 3D illustration constructor with 380+ isometric objects
Control Illustrations - 108 free flat illustrations with customizable characters
Characterz - Biggest diverse mix and match 3D illustration library
Humaaans - Mix-&-match illustrations of humans with a design library.
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers