As the blind have done without something like the DROP GPS device for so long, it makes me feel ashamed for us folks with sight who rely so heavily on navigation systems. The palm-size gadget is truly revolutionary. Using the tried and true technology of braille, the DROP GPS device helps guide the visually impaired around a city center, so that they won't end up miles from their destination.
It is how the DROP GPS device actually works that is so amazing. The braille clusters represent the buildings while the flat surfaces represent the streets and alleys. The braille will actually move when the environment changes! That, coupled with an audio guide system, ensures that those without sight will get to exactly where they're going.