Vote for Maxpatrol - network Security Scanner

MaxPatrol is a network security scanner optimized for effective use by companies of any size (serving from a few to tens of thousands of nodes). It supports vulnerability testing for servers with non-standard configurations, intelligent recognition of vulnerabilities in known (and custom) web-server scripts, identification of RPC services and more. The program uses inspection methods to minimize false detections. MaxPatrol has at its disposal a protection analyzer developed for web servers and web applications (e.g. internet shops).
Although MaxPatrol operates within Microsoft Windows, it can test for possible vulnerabilities in any software or hardware platform: from Windows workstations to Cisco networks (*nix, Solaris, Novell, AS400, etc.). Additional features include scheduled scans, custom level vulnerabilities, full scan history and more.