Bagels are another great choice. They come in a variety of flavors, are almost always fat free and they are easy to find. Just watch out for the cream cheese, try reduced fat or nonfat cream cheese or your favorite jam. Muffins can be loaded with hidden fat and calories. Many popular muffin mixes are now available in reduced fat versions and for the ready to eat crowd, Pepperidge Farms Wholesome Choice varieties are a good option.
English muffins are another good selection.
Now a word of warning about those fat free danish pastries on the market. Fat free doesn't mean calorie free. Commercial bakeries often improve the texture of fat free products by increasing the sugar. To compensate for the high calorie count, serving sizes are often microscopic - who really eats just a quarter of an apple danish for a serving. Check the serving size before you dig in.