ArcBlock is creating a blockchain ecosystem for building decentralized applications. Their goal is to provide consumers with the framework and tools to use decentralized apps as easily as current web-based versions. ArcBlock was founded by Robert Mao and Flavien Charlton, who also created Colored Coins, Open Assets Protocol and Openchain.
ArcBlock's Open Chain Access Protocol gives developers an abstract layer for using underlying blockchains. It has a serverless computing architecture that supports various types of applications. ArcBlock is based on the Blocknet application protocol that executes smart contracts and can access external data sources. Blocknet's design and open chain access protocol provide a layer for accessing multiple blockchains.

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.

pTokens are digital assets that are transparently pegged to another underlying asset. pTokens serve as a Cross-Chain token wrapper that allows users to more easily transfer value between different blockchains. Users can deposit a certain amount of the underlying asset (such as BTC or EOS) and request the equivalent pTokens that are pegged to them 1:1, such as pBTC or pEOS. Token holders can then take advantage of the Ethereum network by more easily exchanging them into ERC-20 tokens.