Pixabay
pixabay.com
A community-driven library of over 4 million free images, videos, audio tracks, and vector illustrations licensed for use without attribution.
Why it is useful
One of the largest free media libraries available with a content-type breadth that includes vectors, illustrations, and audio that most competitors don't cover. The Pixabay license explicitly permits commercial use without attribution — legally cleaner than Creative Commons-licensed content that requires attribution tracking. The AI-generated content is clearly labeled separately from photography.