Yes...here's three
...Krusteaz Fat Free Blueberry Muffin Mix, Krusteaz Cranberry Orange Muffin Mix, and Krusteaz Banana Muffin Mix.
Seriously, these are just add water and they are good.
I've been off and on a diet pretty much for the last 11 years. Most baked fat free stuff just comes out rubbery. The krusteaz ones are really good and will run you between $2.50 and $3.50 a box.
hth