Joost Vanhoutte has been selling textures and HDRIs on gumroad for a long time now, but yesterday he announced that his site (texture.ninja) is now free :D
It has over 4000 high res textures available for instant download on http://texture.ninja
Текстуры можно использовать для коммерческих проектов.
Единственное ограничение — нельзя распростоанять оригинальный файл текстуры в неизмененном виде.
You are allowed to use these textures for commercial work. Whether you paid for access to the website or if you’re a free user.
You may not redistribute unmodified textures.
https://www.blendernation.com/2017/05/19/4000-free-textures-no-sign/