We've been working on proof-of-stake and blockchain scaling/interoperability infrastructure since 2014. It all starts with a classical BFT algorithm which provides simple light-client proofs and fork-accountability. Your mobile phone can verify transaction finality in 5 seconds, with no need for an hour of block confirmations as in Bitcoin proof-of-work mining.

  https://github.com/tendermint/tendermint <-- blockchain consensus engine
  https://github.com/cosmos/cosmos-sdk     <-- blockchain framework in Go
  https://github.com/keppel/lotion         <-- blockchain framework in JS
  https://github.com/cosmos/voyager        <-- blockchain explorer
  https://github.com/tendermint/go-amino   <-- blockchain codec derived from Proto3
  https://cosmos.network
  https://tendermint.com

The Cosmos Hub will launch very soon. Lets build stuff! Onion routing for Tendermint would be a great addition. And DNS/name-resolution on Tendermint can actually solve Zooko's triangle. While we're at it, lets fork Go too. https://groups.google.com/forum/#!msg/e-lang/cQiXS_GnKS4/Zsk...

Disclaimer: I'm a cofounder of the Cosmos project, cofounder of Tendermint, and long-time HN lurker.