Fluid Paint
The texture here is shockingly realistic.
Tags: texture
3
NoisePNG - Generate noisy PNG-images with alpha-transparency
If you’re adding some noise texture to your backgrounds, this little service might be handy. I usually base-64 encode these kinds of background images: it would be nice to see that added as an option here.
Urban Dirty: Free texture stock photography for your artwork, desktop and design
A nice collection of royalty free texture photos using the Flickr API.