Top Alternatives to Windows Server 2012

Gentoo Linux is a flexible and highly customizable Linux distribution known for its source-based package management system, Portage. Designed for experienced users who desire granular control over their software installations and system optimization, Gentoo offers unparalleled flexibility in configuring a system precisely to individual needs.

CentOS is an open-source operating system derived from the source code of Red Hat Enterprise Linux (RHEL). It provides a stable, enterprise-class platform for servers and workstations, supported by a vibrant community.

Red Hat Enterprise Linux (RHEL) is a powerful, stable, and secure open-source operating system platform designed for demanding enterprise environments. Known for its robust performance and extensive support, RHEL is a leading choice for critical workloads.

ClearOS is a robust Linux distribution serving as a comprehensive server solution for small to medium-sized businesses. It provides a unified platform for networking, gateway, and server functions with a user-friendly web-based interface.

Zentyal is a comprehensive open source server solution based on Ubuntu, providing critical network services such as email, groupware, file sharing, and network infrastructure roles like directory services and gateway functions, all managed through an intuitive web interface.

Ubuntu Server is a robust and scalable open-source operating system specifically designed for server environments. It provides a stable and secure foundation for a wide range of applications, from cloud deployments and data centers to enterprise infrastructure and development platforms.

NethServer is a modular operating system optimized for small to medium businesses (SMBs) and branch offices. It offers a comprehensive suite of network services and unified threat management (UTM) capabilities, managed through an intuitive web interface. Built on CentOS, NethServer provides a stable and secure platform for essential IT infrastructure.

Univention Corporate Server (UCS) is a comprehensive operating system and identity and infrastructure management platform. Based on Debian, it provides powerful tools for managing servers, services, applications, and users in diverse IT environments. UCS is designed for flexibility, supporting on-premises, cloud, and hybrid deployments.

Amahi Home Server is a free and open-source server system based on Fedora Linux, designed to simplify home networking and digital life. It provides easy-to-use solutions for file sharing, backups, media streaming, and application management within a home environment.

CoreOS, now part of Red Hat, is a lightweight Linux-based operating system designed specifically for containerized workloads and clustered deployments. It focuses on automation, ease of management, and security through features like atomic updates and built-in container orchestration hooks.

Endian Firewall Community is a powerful, open-source Unified Threat Management (UTM) solution designed to provide comprehensive network security. It integrates firewall, gateway, VPN, web security, and email security features into a single, easy-to-manage appliance.