Pexels is not just another free stock photography site, it’s easy to use and has high quality images all in one place. Posts that include images often receive 650% higher engagement than text-only posts. You can discover photographers as well as search for free images.
Additionally, you can also enter photo challenges where the theme range from everyday people to office space. Whatever mood you are in, you can certainly find an image to convey that emotion on Pexels.