A Wealth of Beautiful Tiling Backgrounds for Your Designs
If want to find a ton of high-quality tiling/repeating background patterns to use in your designs, head over to Subtle Patterns.
I should also highlight that the 382 patterns and textures — and more are added regularly — on Subtle Patterns are free.
Subtle Patterns is a project by web designer Atle Mo. All patterns on the site are under the Creative Commons CC BY-SA 3.0 license.