Ethereum is a virtual machine built on top of the blockchain that lets you create and run smart contracts that then run on the blockchain.
When New Tech and Dated Policies Collide a Conversation with Vitalik Buterin
Dapp - Simple tool for creating Ethereum-based dapps.
Proof of Stake FAQ
Around the Block | Episode 2 | Scars of Consensus
"People don't realize how close the tech is to being ready" - Vitalik & Balaji Srinivasan at ETHSF (2018)
ethereum-haskell - Independent reimplementation of Ethereum in Haskell.
Ask HN: Any ICO that actually delivers what it promises? (2018)
Week in Ethereum News
evm-tools - Collection of tools for working with the evm.