Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.

CGTrader - CGTrader is an online marketplace at which artists can sell and buy Revit and 3D models.

motosha - Real free high quality stock photos for commercial and private use! From selected professional photographers. Simple download without registration, without obligations. Best quality and 100% Free.

3DExport - 3DExport is a 3D model marketplace where you can buy and sell 3D models, CG textures and digital objects for 3D printing with royalty free. Professional 3D models - 3DExport.com

Negative Space - Free stock photos

TurboSquid - TurboSquid offers 3D models for professionals.