# Use Cases

Use these roadmaps to walk you, task-by-task, through implementing your use case.

Here are some of our users' most popular use cases:

* **[Run a rippled Validator](run-a-rippled-validator.html)**

      Learn how to install, run, and maintain a `rippled` server in validator mode.

* **[List XRP in Your Exchange](list-xrp-in-your-exchange.html)**

      Integrate with the XRP Ledger to be able to list XRP in your exchange, enabling your users to deposit and withdraw XRP.

* **[Open a Payment Channel to Enable an Inter-Exchange Network](open-a-payment-channel-to-enable-an-inter-exchange-network.html)**

      Use a payment channel to move XRP from your digital exchange to another digital exchange.

* **[Contribute Code to `rippled`](contribute-code-to-rippled.html)**

      Help us improve the open source reference server implementation of `rippled`, the server that is the core of the XRP Ledger peer-to-peer network.

* **[Contribute Code to `ripple-lib`](contribute-code-to-ripple-lib.html)**

      Help us improve `ripple-lib`, the official client library for RippleAPI.

* **[Use an Escrow as a Smart Contract](use-an-escrow-as-a-smart-contract.html)**

      Learn how to use the XRP Ledger escrow feature to provide a smart contract.

Want to see a roadmap for a case not listed here? [Contact us >](mailto:docs@ripple.com)