Free to use for your personal or commercial work, you don't need any permission.
32 Bricks, Grass and Floor textures great for your designing work, great for 3d renders, amazing for game models.
All the textures comes with normal, displacement, specular and AO maps.
The images those textures are based on are from texturelib ( Texturelib allows you to use the textures for commercial work and they don't require to credit them but it is okay it you do ).
What i did is that i took the seam images and turned then into seamless textures, and created the normal, displacement, specular and AO maps.
Download the package here.