Forget your key? Unlock your front door with a four-digit number that you simply punch into an electronic keypad. This electronic lock is easy to install; you only need a screwdriver. Photo courtesy of Schlage.
Keyless Lock - I like the idea of keyless locks, but often they look too space-age or just plain bizarre. This one is nice because it has a sliding panel to reveal the keypad and the handle itself is not too over designed.
Gordon McComb shows us how to pair an optical finger navigation (OFN) module with an Arduino and a small motor to create a lock box that reads your finger gestures across a small optical window, opening only to a combination you create.