Zentyal Alternatives

NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...

OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.

A very good alternative for Windows Server, for free

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389...

Univention Corporate Server UCS with Active Directory functions and App Center is the cost-efficient and popular successor to Microsoft's server solutions.

FreeNAS is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.

pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more

Secure, fast and economically scalable, Ubuntu helps you make the most of your infrastructure. Whether you want to deploy a cloud or a web farm, Ubuntu Server supports the most popular hardware and software.

Open Source Identity and Access Management for modern Applications and Services.

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

Active Directory is a special-purpose database \ 8212; it is not a registry replacement.

Enterprise-class open source Linux LDAP server.

Samba serves as an open source alternative to the traditional domain controller offered by Microsoft.