Ethereum Compatibility

Harmony & Ethereum tooling compatibility
Harmony ONE is an Ethereum EVM 100% compatible blockchain, and is very good at decentralized application (Dapp) development within many possible verticals including DeFi, NFT, Gaming, and many others.
You can read more about Harmony One Ecosystem - here

Useful articles:

Harmony & Web3

Harmony & Metamask

Harmony & Ethereum Developer Ecosystem

Examples of Harmony projects that use Ethereum RPC