Textures.com - Textures.com is a website that offers digital pictures of all sorts of materials.
Bannerwise - We empower marketing teams to unlock the full potential of digital advertising by simplifying and automating digital ad production.
Poly Haven - Poly Haven (formerly known as Texture Haven) is an online website where you will find scanned textures without any cost and that are of high quality.
BannerFlow - HTML5 display ad production platform
Poliigon - A library of materials, and HDR's for artists including free textures that want photorealism.
Mind Your Banners - Make your online profiles stand out.