TrafMeter 

TrafMeter provides a powerful accounting and realtime monitoring of Internet traffic to and from a local network with. It can produce XML traffic reports or/and log traffic counters into a database. It can track visited websites by its name.
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ServiceKeeper 

Administration, Monitoring and Recovery of any networked resources (Windows Services, TCP/IP Services, web servers, routers, file systems, Process memory and CPU usage, Event Log, ...) and notifcation in case of downtime (email, SMS, phone call, ...)
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NetCom 

Easy-to-use packets-level filtering. NetCom is an extensible firewall, traffic controller, QoS, Bandwidth, Bridging, Redirection, NAT and traffic statistics software for the Microsoft Windows.
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Server Monitor 

Server Monitor is a Windows service that monitors the health and availability of Windows servers, network services (on Windows, Linux and other operating systems), and devices. No agents are needed to monitor remote servers.
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XR PerfMon Tools 

XR PerfMon Tools remotely monitors MS Windows computers using WMI technology, providing valuable information for system administrators to optimize the efficiency and setup of servers and workstations. OPC server is available in other versions.
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LivePerf 

LivePerf is a performance monitoring tool, featuring user-defined views and statistics, custom data collection (from SQL and command line tools) and log and replay. Supports Websphere,Windows,Oracle,Solaris,ASP.NET,SQL Server,DB2 and others.
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