NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
Cisco ACI - Application Centric Infrastructure (ACI) simplifies, optimizes, and accelerates the application deployment lifecycle in next-generation data centers and clouds.
ClearOS - A very good alternative for Windows Server, for free
ManageEngine OpManager - Monitors routers, switches, firewalls, load-balancers, wireless LAN controllers, servers, VMs, printers, storage devices, and everything that has an IP and is connected to the network.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
Extreme Networks - Extreme Networks (EXTR) delivers customer-driven enterprise networking solutions that create stronger connections with customers, partners, and employees.