Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Craftwork - A collection of User Interface resources made by Craftwork
Iconscout - Design Resource Marketplace.
Wannathis - 3d illustrations and freebies
Humaaans - Mix-&-match illustrations of humans with a design library.
Absurd Design - Free surrealist illustrations for landing pages. 💡