What are some alternatives?
Flaticon - A database of free vector icons.
DxO ONE - DSLR image quality for your iPhone
Snapixen - Snapixen is a website where you can upload any image you want.
Pixabay - Over 270,000 free photos, vectors and art illustrations
Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.
TurboSquid - TurboSquid offers 3D models for professionals.