Luxology, makers of the super cool modo 3D modeling package, have introduced imageSynth, a $99 plug-in for creating tiling textures within Photoshop. Check out the 4-minute video intro to see this interactive approach to tile generation, or see the press release for more info.
If you’d rather stick with Photoshop’s built-in tools, check out Dave Nagel’s Texture Generators, a set of 15 actions for creating paper and other rough textures. Dave’s article for Digital Producer Magazine links to the actions and walks through how to use them.
And if you’re looking for textures that are good to go as-is (or that can be used as nice seeds for imageSynth, etc.), check out Texture King, a great set of free images offered by site creator REH3design. [Via]
[Update: Enrique Flouret from The Photoshop Roadmap offers a tutorial on texture creation using the new Filter Forge toolset.]