Iconscout - Design Resource Marketplace.
Humaaans - Mix-&-match illustrations of humans with a design library.
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.
Handsome Illustrations - Create unique illustrations for websites & applications.
Craftwork - A collection of User Interface resources made by Craftwork
Blush - Illustrations for everyone