Iconscout - Design Resource Marketplace.
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Office Club Illustration pack - Whether you’re creating a website or mobile app, showcasing a portfolio, publishing a blog, or an e-commerce store — Office Club’s 100 illustrations and designed art directions help you create the best possible products.
Craftwork - A collection of User Interface resources made by Craftwork
Mio Illustration Pack - Cute, expressive and customizable illustration pack
3dicons - 3dicons library offers beautifully designed open-source 3D icons.