I have been looking frequently for a site, a service that provides a repository of semi-transparent tiling backgrounds. I’ve found some grain generators, but I would like some more things that I could use for effects like; etchings, smoke, blur, rust or dirt.
I love these kind of background tiles as it can really add a lot of depth to your design. It’s just so hard to find a go-to place where I can buy and download.
I have been finding some really great ones on http://subtlepatterns.com/. They’re all free to use, provided you credit them somewhere.