Open Peeps - A hand-drawn illustration library.
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Control Illustrations - 108 free flat illustrations with customizable characters
Craftwork - A collection of User Interface resources made by Craftwork
Handsome Illustrations - Create unique illustrations for websites & applications.
Wannathis - 3d illustrations and freebies