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.

Kadena is a software development company that builds blockchain-based platforms for a range of businesses. They develop purpose-built blockchain solutions for their clients by using proprietary solutions that are aimed at being both secure and scalable. Kadena offers both private and public blockchain platforms, with smart contracts written in the Pact programming language. They've also developed an innovative proof-of-work architecture called ChainWeb that could have a variety of applications.
Kadena's founders have experience working for the U.S. Securities and Exchange Commission (SEC) and JPMorgan Chase Bank. The company has raised significant funding and is well positioned to be play a big role in developing future blockchain solutions for large financial institutions.

High Performance Blockchain (HPB) is a Chinese company that is developing an improved blockchain infrastructure. Their goal is to dramatically improve the speed of transactions and throughput of existing blockchain systems. HPB has been called the EOS of China.
Similar to EOS, HPB uses a delegated Proof of Stake (DPoS) consensus algorithm that will enable parallel processing. It will also aid in improving the performance of their blockchain, and they hope that it will enable the creation of an ecosystem for the creation of decentralized applications.
HPB's platform is based on hardware accelerator chip drivers. The accelerator chips can be customized and will aid in the performance of the blockchain. HPB has the ambitious goal of enabling 1 million transactions per second.
The company's founders are well connected in the blockchain and payment sector in China. NEO is one of the chief investors in the company, and they also works with Union Pay; which is an influential payment network that connects banks in China.