A chrome extension that puts a Facebook reaction bar on Twitter. It let’s you create publicly clickable Facebook share links on Twitter, rather then simply linking an account to Facebook.
Use it in API mode:
But, I'll resist the urge - I met a ton of interesting startups in Startup School.
One that I found particularly interesting was Voco: https://sayvoco.com/
They were installing Alexa devices in nursing homes for seniors, while I dislike the privacy implications I can see a massive quality of life improvement.