Cardstack is a blockchain technology company that is developing an open-source framework and consensus protocol to make blockchains more usable and scalable. Their goal is to create a decentralized modular smart contract ecosystem. The Cardstack network is powered by the Ethereum-based CARD token.

RIF Token powers the Root Infrastructure Framework Open Standard network. The platform will consist of a suite of open and decentralized infrastructure protocols that will enable faster and easier development of DApps that can work on the Bitcoin blockchain. RIF is built on the RSK smart contract platform, which is secured by Bitcoin's blockchain.

Nethereum is an open source .NET integration library for Ethereum. It is designed to help developers easily integrate the Ethereum blockchain into their .NET applications. It consists of modular libraries for features that are covered are writing smart contracts, cryptographic wallets, DApps, and managing blockchain data.