Thinstation - Thinstation is a basic and small, yet very powerful, open source thin client operating system...
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
DRBL - DRBL (Diskless Remote Boot in Linux) is a free software, open source solution to managing the...
NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
LTSP - The Linux Terminal Server Project adds thin-client support to Linux servers.
Univention Corporate Server - Univention Corporate Server UCS with Active Directory functions and App Center is the cost-efficient and popular successor to Microsoft's server solutions.