TLDR - The quickest, easiest way to share articles with friends
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.
Winds - Open source & beautiful RSS reader
NoPass.me - Open-source identity verification
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
0xcert - Your ID, degree or house. 0xcert-ified on the blockchain