The Ethereum universe grows really fast and you get lost very soon when you try to get a good intro on actual developments, “The Ethereum Wiki” is good start to get an overview on Ethereum projects and related tokens.
When you start thinking about your own Ethereum application, you have to solve the question how to store the related data, some startups using the IPFS filesystem. Then the next decision could be: “How can I search efficiently on this Filesytsem ?” . A solution could be the AFIX – Advanced File Index from Novus.
… and the first beer was paid over the lightning network.