Ask HN: What are the best hackathon ideas you have seen?

http://hackinghealth.camp/fr/ I believe health related hackathons are the best. Because in the end you know you are participating for the Greater Good

I feel like you need just as many Lawyers there to tell you why every health idea won't work.

https://github.com/getpagr/getpagr ( not associated in any way with it)

http://podroulette.com