There are a Total of eight movies that feature Freddy Krueger. And one that cameos him.
1)A Nightmare on Elm Street 2)Freddy's Revenge 3)Dream Warriors 4)The Dream Master 5)The Dream Child 6)Freddy's Dead 7)New Nightmare 8)Freddy vs Jason
Freddy also had a cameo in Jason Goes to Hell, only very briefly at the end. Was just his glove and his laugh.
In 2010, there is supposed to be a remake of the original.