Letterland
This programme comes from England and was designed to help teach children with a variety of learning challenges. We haven't used it specifically as a curriculum, but I did buy the Letterland ABC book and we use that to help learn the letters and sounds and what direction each letter faces (dyslexia lives here). It has been very helpful and did not cost too much. :)

This company is well worth checking out at your local homeschool book fair if you still have any pre-readers or children struggling with learning to read.