Don Norman wrote in Fast Company about how society is designed against the elderly and doesn't take into consideration reduction in vision and auditory capabilities.
San Francisco designer and engineer Taylor Tabb created a HP themed printer shoe that has a printer in the heel, and called it Footprints. *chef's kiss*
Tella is a very handy video recording tool that allows you to record your screen and your camera feed at the same time, ideally to make great demo videos.