High res texture pack from Caleb Kimbrough. It includes 8 light grunge textures that can be used for your personal or commercial projects, ..
10 high resolution concrete textures taken during a trip to New York City.
In order to achieve a more cosmic feel a couple of regular concrete and rust textures were blended together in Photoshop.
Concrete / Tarmac with yellow paint splatters, they also have various cracks
Combining various different type of textures to get some extreme grunge texture effects
24 various concrete textures some with cracks and stains availiable via flickr
