TUTORIAL: How to make a seamless repeating pattern ALSO: Good images for pattern making

You don't need another pattern creator to create patterns. What you need is a photo editing program. I'd recommend Gimp, since it has many good features and is also free. This is just required for patterns from your own images. You don't need it to create simpler patterns or patterns from images that are already seamless. You can download Gimp here: http://www.gimp.org/ I hope that helps! :D