The Polkadot blockchain is a multi-chain blockchain that is designed to bundle multiple chains together so that they can be executed in parallel. The goal is for every block on the Polkadot blockchain to contain multiple blocks from other chains. This will enable the network to contain the transaction information from multiple chains and dramatically increase the overall interoperability between different blockchain networks. Polkadot was created by the Web3 Foundation, which is led by Gavin Wood, one of the founders of Ethereum. Polkadot is their flagship project, and aims to solve the issues in the blockchain ecosystem related to disjointed governance and interoperability.

Add.xyz is full-stack DeFi aggregator that places a strong emphasis on privacy and security. Add.xyz provides users with a suite of DeFi services in one unified platform that is powered by the ADD token; including: lending, staking, coin blending and swapping. The platform has several off-chain and on-chain privacy mechanisms that are designed to increase anonymity and privacy for DeFi services. The Add.xyz protocol unifies several of the leading DeFi protocols and blockchain infrastructures. It enables communication between the different protocols to create and execute various financial transactions.

Mixin is a cross-chain payment network for digital assets. Mixin provides a cross-chain solution with built-in smart contracts that facilitates crypto-asset transfers. Developers can also build cross-chain DApps based on Mixin Network protocol.
Mixin also has a messenger that is built on top of their platform and allows users to access their crypto-assets with a phone number and a 6-digit PIN code. Mixin supports Bitcoin, Bitcoin Cash, Litecoin, Ethereum, Ethereum Classic, Ripple, Sia, and plans on adding more.
The network is powered by the XIN token.