The HAX hardware accelerator held its 8th Demo Day in San Francisco yesterday. While all 15 companies in the latest batch hold promise, and encompass some very wild ambitions, these three stood out thanks to creative applications of advanced tech to sometimes overlooked, but truly massive potential markets.

"The first step is being aware and bringing it to your attention... [Keen2] really is a brilliant idea."
–Howie Mandel on the Marcus Lemonis podcast