- Ethereum Core Infrastructure: on-topic, because the adoption would need to be orders of magnitudes higher to justify own StackExchanges
- Stand-alone Ethereum Forks: on-topic, because not much questions anyway, we can tolerate them until one has a share of >10%
- Projects that implement the EVM: on-topic, because same argument
- Projects utilizing Solidity or Serpent: on-topic, because same argument
- Smart Contracts and Frameworks: off-topic, because what's the point if they don't even touch Ethereum?
- Distributed Applications and Storage: on-topic, because vital to the DApp vision. Poor questioner would be lost in Stackoverflow, here are the experts.