Ethereum is a both a (crypto-)currency but also a fully decentralized computing platform. It's like a CPU with memory but fully spread across thousands of computers.
Ethereum has governance that is decentralised and open via the Ethereum Improvement Proposals scheme.
Ethereum has multiple independent institutions that establish it:
- Ethereum Foundation (original institution)
- Consensys (commercial company)
- Etherealize (aimed at Wall Street and traditional finance)
- Ethlabs (nonprofit R&D)
- Ethereum Institutional (nonprofit aimed at banks, asset managers, governments)
- EthSystems (privacy and compliance infrastructure)
Other Ethereum places:
- https://strawmap.org/ — Roadmap
- https://ethresear.ch/ — Researchers forum
- https://ethereum-magicians.org/ — Protocol proposals and EIPs
- https://eips.ethereum.org/ — Ethereum Improvement Proposals (EIPs)