Keybase Chat - End-to-end encrypted chat built into Keybase
OpenSea - Ebay for cryptogoods. Buy and sell items on the blockchain.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
NFT Scoring - NFT Scoring tracks and analyses all NFT projects.
Seald - Keep your conversations secure, everywhere.
Rarible - Create, sell, collect digital items secured with blockchain