NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
OpenLDAP - OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.
ClearOS - A very good alternative for Windows Server, for free
Okta - Enterprise-grade identity management for all your apps, users & devices