NoPass.me - Open-source identity verification
OpenSea - Ebay for cryptogoods. Buy and sell items on the blockchain.
Amazon Cognito - Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.
NFT Scoring - NFT Scoring tracks and analyses all NFT projects.
Civic Token - Access to identity verification via the blockchain
Rarible - Create, sell, collect digital items secured with blockchain