Free SFX
A hugely popular free SFX library with a clean interface and well-organized categories. Great quality across the board.
One of the larger free sound effects libraries online. Zapsplat offers a huge collection across virtually every category — nature, urban, impacts, foley, sci-fi, horror, UI, and much more. Searchable and well-categorized. Free with attribution, or a paid membership removes the attribution requirement.
The quality is generally good — better than most free SFX sites. New sounds are added regularly. The search and category browsing work well. The free tier limits you to a certain number of downloads per day and requires attribution in your credits.
Good general-purpose SFX source for projects of any size.
Large, well-organized SFX source for game development. Most common game audio needs are covered — UI sounds, environmental ambiences, impacts, creature sounds, sci-fi elements. The free tier with attribution works for many indie game scenarios. Paid tier removes attribution if needed.
Zapsplat
https://www.zapsplat.com/
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Freesound
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Royalty-free, no-attribution-required bundles with professional quality specifically for game audio.
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