Shapefest - A massive library of 3D shapes for everything!
Iconscout - Design Resource Marketplace.
PixCap - A browser-based 3D animation editor and assets 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.
Wannathis - 3d illustrations and freebies
Craftwork - A collection of User Interface resources made by Craftwork