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.

IRISnet is a blockchain network that is built on top of Cosmos. It aims to enable the integration of off-chain computing, as well as greater inter-operability across blockchain networks. IRISnet uses the Tendermint protocol as a consensus mechanism.

Zipper is developing a cross-chain messaging and transaction network. It's powered by the ZIP token. The company is backed by Qtum, OKEX, and other established blockchain companies.