"Scarcely a week goes by when I don't hear about yet another new (or relatively new) open source project that stands in for a proprietary solution. Consider Untangle, a network gateway appliance than runs on any commodity hardware and handles spam, firewalling, Web filtering and protocol controls, VPN, and tons more. They'll even send you a preloaded demo server.
"Untangle bundles 12 GNU GPLv2-licensed apps under one roof, including reporting and analysis tools to help you make sense of it all. The OS also is included--all you need do is download an ISO and burn an install disc, or boot the ISO in a virtual machine..."
