Years ago someone introduced me to the Harvard Business School's Elevator Pitch Builder. I found it to be a great, simple tool every time I started a new project or venture that I needed to explain to people. At some point in the last couple years Harvard redid their business school's site and did not port over the pitch builder.
Well, I liked and got so much use out of the tool that I decided to recreate it: http://mjumbewu.github.io/elevator-pitch-builder/ (source). It's optimized for smaller screens. This was also a good exercise in playing with material design concepts using CSS animations. Check it out. Let me know what you think at @mjumbewu.