SME Server

Exceptionally reliable and easy to use, SME Server can be installed and configured in less than 20 minutes – yet it’s powered by a secure and open Linux platform that’s fully upgradeable and customizable. Simply install it on any standard PC and in minutes you’ll have a robust Linux-based LAMP server capable of fully replacing those expensive Windows server licenses and providing a full range of services – including e-mail, firewall, file and print-sharing, web hosting, remote access and more.

via SME Server:About – SME Server.