LANzer(LAN Analyzer) is a Free NetWork tools Suite. It is intended to be a tool to learn and a useful help in networkind in general. Its a Personal project with hope to be more.
Vopos gives you a visual representation of FW1 objects. It will be able to dump objects to a db or file and perform some simple checks against an internal DNS. It is useful to check consistence of configuration across a network.
Access control by MAC-address and IP-address pair in Microsoft ISA Server 2000/2004/2006