Openverse - Openverse is an Openly Licensed Images and Audio database and a growing community of photographers, illustrators, and musicians who share their work under a Creative Commons license.
Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.
Stock Up - The best free stock photos in one place
Freepik - More than a million free vectors, PSD, photos and free icons. Exclusive freebies and all graphic resources that you need for your projects
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.
Pixabay - Over 270,000 free photos, vectors and art illustrations