BlockCypher - AWS for Block Chains
NoPass.me - Open-source identity verification
Nxt Platform - Ardor is a cryptocurrency and blockchain technology platform with tools to build successful blockchain applications out of the box. Scalable and easy to use.
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.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Civic Token - Access to identity verification via the blockchain