Transparent Textures offers a wide range of textures that are transparent, making it easy to add color. You can download an image or the CSS code for each texture.
The Pattern Library
The Pattern Library is a collection of unique patterns and backgrounds, which are free for you to use as heart desires.
Subtle Patterns by Toptal offers a wide variety of subtle patterns and backgrounds that are free and of the highest quality.
Texture King offers over 400 high quality textures, from concrete, to wood, to fabric and more. All textures are free to use on your next project.
SVG Backgrounds is a tool to create eye-catching backgrounds or patterns for websites & blogs. The tool allows you to customize and apply backgrounds fast.