# Interoperability, messaging & data

- Canonical page: [Interoperability, messaging & data](https://www.qrlecosystem.com/categories/interoperability-messaging-data/)

## Projects
- [PQlyMarket](https://www.qrlecosystem.com/projects/pqlymarket/index.html.md): An open-source prediction-market dApp for the QRL 2.0 testnet with market creation, YES/NO conditional-token trading, constant-product automated market makers, liquidity provision, oracle resolution, and a testnet faucet.
- [QuantaSwap](https://www.qrlecosystem.com/projects/quantaswap/index.html.md): Cross-chain atomic swaps between native QRL and native ETH using hashed timelock contracts on both chains. No bridge, no wrapped assets, no custodian: each leg settles natively and the swap secret never leaves the client.