750+ Quality And Free Textures By Lost & Taken
Lost & Taken is a website, curated by Caleb Kimbrough, that is totally focused on creating and providing free textures to designers.
Currently, there are 750+ high resolution textures in the gallery which are very well categorized (grunge, water, clouds, etc.) that helps reaching the right resource easier.
Besides the gallery, the website/blog itself is a must-follow for texture fans as it features collections of them.
P.S. All textures are free to use in both personal and commercial projects.