Ninox - Ninox is a human-friendly database. Create your own Business Application with Ninox that matches your workflow. Ninox lets you integrate CRM, ERP, HR and many more...
NoPass.me - Open-source identity verification
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
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.
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Civic Token - Access to identity verification via the blockchain