This is app is a must have! It's free. It has facial recognition, document camera/reader, barcode camera (which tells you about the product even cooking instructions on food packets!), currency identifier, scene and person descriptors.
This is the latest and greatest in the BrailleNote family. This is the newest notetaker now with a Touch Screen! Check out the link for more information and specific product details. This links to one with a 32 character Braille display.