Vololights

Typical brake lights only light up when you decelerate by applying the bikes brake levelers.  However, commonly motorcyclist use engine braking and manually downshifting though gears to slow.  Unlike braking, downshifting does not alert other drivers of your deceleration.  This can leave the you susceptible to being rear-ended, particularly by distracted  drivers.

To remedy this problem, the teams at Vectolabs came up with Vololights.  Vololights attach to your license plate support and flash whenever it senses you are decelerating to alert others that you are slowing.  Pretty cool.

Vololights recently received funding through Kickstarter, so if this looks like something you are interested in you should be able to get one soon.