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.

Nxt is a blockchain platform developed by Jelurida, which is also developing the Ardor blockchain. Nxt's goal is to improve upon existing blockchain platforms with a modular toolset that enables users to create their own digital assets that can be listed on decentralized marketplaces. Nxt also features community driven voting mechanisms and has an architecture that separates the blockchain into parent and child blockchains.
The network is powered by the NXT token and has a Proof-of-Stake (PoS) consensus mechanism.

ThunderCore is a Proof of Stake blockchain that is powered by the native Thunder Token. ThunderCore is compatible with Ethereum and is designed to have fast confirmation times. Transactions are verified by consensus nodes that complete a round of voting to confirm transactions in under one second. The network's compatibility with Ethereum is intended to allow developers to easily migrate DApps to the platform.