Genetica Viewer is a free seamless texture rendering application that allows artists to make use of textures that are saved in Genetica's powerful texture format. Genetica Viewer is capable of rendering textures at any resolution up to 3,000 x 3,000. Genetica textures include embedded effect maps for use with any channel supported by your 3D environment, including bump and specular. Genetica Viewer can make a number of adjustments to each material, such as re-randomizing the texture, zooming the texture while maintaining seamless edges, and color adjustments. With hundreds of included textures of all types, automatic seamlessness, resolution-independence, and unprecedented flexibility, Genetica Viewer will help you revolutionize your textures.
The textures are really rather good for a free program, especially once you consider the bump maps. All the ones I've checked so far are also 100% seamless.
It's useful! FSB tests a strategy very fast, includes an automatic strategy generator.
It uses different method of bar interpolation and that make it very reliable.