From Dipl.-Ing. Christian Begand:
With Bricks'n'Tiles you can create perfectly seamless brick textures in photorealistic quality in a couple of minutes. Just select a few bricks from any source images such as photos taken with a digital camera. Bricks'n'Tiles automatically arranges the bricks and slightly alters the brick colors by random to create any possible brick pattern. Features includes: creates brick textures from virtually any source image; textures are perfectly seamless in horizontal and vertical direction without any post-editing; different built in brick pattern generators for regular and irregular brick pattern; integrated brick variation algorithms help to create more natural brick distribution; import and export of many common file formats (bmp, jpg, png, tif, gif); and supports some special texture types for texturing brick borders, arches, vaults, or columns.
Version 1.5.3 supports generation of highly detailed brick surface Normal Maps.