Keycloak – Open Source Identity and Access Management
https://www.keycloak.org/

Add authentication to applications and secure services with minimum fuss. No need to deal with storing users or authenticating users. It’s all available out of the box. You’ll even get advanced features such as User Federation, Identity Brokering and Social Login. This will be added to Script Resources Subject Tracer™. This will be added to WWWReference Subject Tracer™. This will be added to Business Intelligence Resources Subject Tracer™. This will be added to Entrepreneurial Resources Subject Tracer™. This will be added to the tools section of Research Resources Subject Tracer™ .