This collection of high resolution patterns, created using Filter Forge Photoshop Plugin, are both large and visually attractive enough to use them for production work.
Each image is a 1000 x 1000 pixels tileable pattern. It means that you can tile them to create a larger image.
Usage rights: You can use these images any way you want, even in commercial projects. A link back to Photoshop Roadmap is greatly appreciated, but not mandatory at all.
Click on each image to go to the pattern download page.