[diveanon]

Uniswap, ApeSwap, PancakeSwap, SushiSwap, AAVE, Compound, Relay, and many many more.

Check out dappradar for a more exhaustive list of the literal thousands of decentralized finance projects that are currently live.

You can interact with any of these directly from the contract interface itself.

[whoisninja]

where is the code being executed ? hosted nodes or real peers in a "p2p" network?

why does it hard fork so much and make prior clients incompatible? why do they have a monetary policy? isn't that what fiat currency is?