Site:
filecoin.io
Project Serum describes itself as a functional decentralized exchange with trustless cross-chain trading, at the speed and price that customers want. Despite living natively on Solana, it will be interoperable with Ethereum.
Ripple is a global payment protocol aimed to provide fast transactions and cheap payments internationally. The network uses a digital currency known as XRP (sometimes it's referred to as Ripple). Unlike other cryptocurrencies Ripple is not aimed to replace banks, rather this project is created to improve the work of banks (including transactions between different banks) via blockchain solutions.
RottenSwap, a deflationary SushiSwap fork.