What startups do you know working in the blockchain for good space?

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I know of a few. Here's is one - AAA COIN (aaacoin.us)
I think philosophically speaking majority of startups who believe in Blockchain are fundamentally trying to do good for the society!
However I've also seen lot of scammers who're misusing this for their own benefits like making quick bucks...
A good one that come to mind is https://blockstack.org
Hey Cecile - came across this tweet which has few Blockchain for good projects listed so thought should share with you :)