i dont know of programs, as i am very new to hsing, but my son (who is now 11) has struggled hard with dyslexia.
for spelling, his teacher took a specialized course in dyslexia) and had my son write the spelling words with his finger on each forearm. this forced him to use both sides of the brain and really helped him. dont know what it was - but i noticed things started clicking for him.
also, handwriting was more difficult, so we used the computer more for him.