Wikimedia Commons
Resource libraryFree media library of millions of images, sounds and videos, each with its licence and author stated.
Completely freeWebFree alternatives to Shutterstock / Adobe Stock4 alternatives
Free alternatives to Shutterstock / Adobe Stock, compared on what really matters: what is free, the licence, whether an account is required and the platforms.
Pixabay
Resource libraryFree images, videos, music and sound effects under the Pixabay content licence; some uses are restricted.
Free, with trade-offsWebPexels
Resource libraryFree stock photos and videos, usable without attribution under the Pexels licence.
Free, with trade-offsWebUnsplash
Resource libraryHigh-resolution photos free to use under the Unsplash licence, commercial use included; selling them unchanged is not allowed.
Free, with trade-offsWeb