NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
Spring Security - The Spring portfolio has many projects, including Spring Framework, Spring IO Platform, Spring Cloud, Spring Boot, Spring Data, Spring Security...
ClearOS - A very good alternative for Windows Server, for free
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
FreeIPA - FreeIPA is an integrated security information management solution combining Linux (Fedora), 389...
JSON Web Token - JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.