What are some alternatives?
Flaticon - A database of free vector icons.
3D MOCKUPER - Bring Ideas to Life with 3D Mockuper
TurboSquid - TurboSquid offers 3D models for professionals.
Pixabay - Over 270,000 free photos, vectors and art illustrations
Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.
Wikimedia Commons - Wikimedia Commons is a media file repository making available public domain and freely-licensed...