# Developers

- [Integration Guide](https://docs.renft.io/developers/integration-guide.md): Step-by-step instructions on how to integrate our collateral-free solution into your project
- [SDK](https://docs.renft.io/developers/sdk.md): Only use this if you are interested in your very own marketplace.
- [@renft/sdk@^v6.0.0](https://docs.renft.io/developers/sdk/renft-sdk-v6.0.0.md)
- [Interacting with Smart Contracts](https://docs.renft.io/developers/sdk/renft-sdk-v6.0.0/interacting-with-smart-contracts.md): How to find the right smart contract to use for your dApp?
- [Collateral-Free Integration Guide](https://docs.renft.io/developers/sdk/renft-sdk-v6.0.0/collateral-free-integration-guide.md): The official instructions on how to interact with our open Collateral-Free rental contracts.
- [Castle Crush (Reward Share)](https://docs.renft.io/developers/sdk/renft-sdk-v6.0.0/castle-crush-reward-share.md): This is a guide on how to the reNFT's SDK to interact with our Reward Share contracts.
- [@renft/sdk@v5.0.4](https://docs.renft.io/developers/sdk/renft-sdk-v5.0.4.md)
- [Collateral-Free Integration Guide](https://docs.renft.io/developers/sdk/renft-sdk-v5.0.4/collateral-free-integration-guide.md): This is a guide on how to use reNFT's SDK to interact with the collateral free contract directly. This tutorial was written for sdk version 5.0.4.
- [Castle Crush (Reward Share)](https://docs.renft.io/developers/sdk/renft-sdk-v5.0.4/castle-crush-reward-share.md): This is a guide on how to use reNFT's SDK to interact with the Wildlife contract directly. This tutorial was written for sdk version 5.0.4.
- [reNFT Contracts' Addresses](https://docs.renft.io/developers/renft-contracts-addresses.md)
- [Querying reNFT's on-chain data](https://docs.renft.io/developers/querying-renfts-on-chain-data.md)
- [Castle Crush (Reward Share)](https://docs.renft.io/developers/querying-renfts-on-chain-data/castle-crush-reward-share.md)


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