Zentyal Server aims at offering small and medium businesses (SMBs) a native drop-in replacement for Windows Small Business Server and Microsoft Exchange Server which can be set up in less than 30 minutes and is both easy to use and affordable.
godot go.eco Virtual Appliance is an all-in-one solution for enterprise networking. It provides Internet gateway, DNS, DHCP, firewall, email, VPN, ACL, and VoIP services, among many others. It is easy to set up and mostly self-configuring. It runs on VMWare Server or Player.