There's a couple of more.. one for Gimp called Texturize which is ofcourse free and Texture Maker the program has a builtin seamless tiling tool which works quite well.
I won't sign it, if it is not a piece of art.. So far, I haven't done any...
Revit Architecture 2012, Max Design 2012, AutoCAD 2012, Moi3d, Maxwell, Octane ... and many working hours