Ruby Advent Calendar 2017 25 Days of Ruby Gems / Libraries, December 1 - December 25 Day 1 - blockchain-lite - Build your own blockchains with crypto hashes; revolutionize the world with blockchains, blockchains, blockchains one block at a time! Day 2 - factbook - Turn the World Factbook (260+ country profiles) into open structured data e.g JSON Upcoming Day 3 Day 4 Day 5 Day 6 Day 7 Day 8 Day 9 D