Icooon-mono
https://icooon-mono.com/
This is a material distribution site where you can download monochrome icon materials that can be used for commercial purposes for free without credit.

https://ramune-material.com/

Okumono
https://sozaino.site/

https://aomaterial.com/

Materials for 3D creators. Has a price filter and tag pages.
https://vr-items.me

https://reincar.net/sozai//

https://ramuneya.com/

https://utamono.com/

https://booth.pm/
https://boothplorer.com/

https://vtem.jp/

https://v2bfree.com/

https://kekuwi.github.io/Runa-Archive/

vtbooru

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