Viacoin is a cryptocurrency that was created in 2014. It is based on the Bitcoin protocol but has several additional features and improvements. Some of its use cases and features include:

1. Atomic Swaps:Viacoin supports atomic swaps, which allow for trustless and secure peer-to-peer trading of cryptocurrencies across different blockchains.

2. Segregated Witness (SegWit): Viacoin was one of the early adopters of SegWit, which helps in reducing transaction malleability and increasing the block size limit.

3. ClearingHouse Protocol:This is a layer built on top of Viacoin that enables decentralized asset issuance, transfer, and trading. It allows users to create and manage their own digital assets on the Viacoin blockchain.

4. Fast Transactions: Viacoin has a fast block time of 24 seconds, making transactions quicker compared to some other cryptocurrencies.

5. Secure and Scalable: Viacoin aims to be secure and scalable, with ongoing development efforts focused on enhancing its performance and usability.

Overall, Viacoin's use cases revolve around fast and secure transactions, atomic swaps for cross-chain trading, and the ability to create and manage digital assets through its ClearingHouse Protocol.