professional Look at Net is a portable network monitoring tools - net scanner, ports scanner and packets sniffer. Don't need third-party libraries, such as WinPCap, etc.
Zenoss Core is an open source IT monitoring product that monitors the configuration, health, and performance of networks, servers, virtual infrastructure and applications through a single, integrated software package.
Simple, small, fast packet sniffer with file logging and address/port filtering. Also includes Conversation window allowing all packets between two addresses to be viewed at once. Can be set to scan and log at startup.
An easy to use Windows solution for network/bandwidth usage monitoring. The software supports SNMP, packet sniffing and netflow to generate live readings and trend data to optimize the efficiency of routers, servers and other network components.
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.
Tired of employers surfing on the net in workhours, children surfing sites you dont want them to see, students waisting your, and their own time by using the net in a non healthy way? Yeah, i thought so! Isnt it time you took some control?
Paessler Netflow Tester is a free program that simply dumps the data of all Netflow packets that a computer receives from a Cisco router. This can be useful when debugging bandwidth monitoring configurations based on Cisco's Netflow protocol.
Test and debug SNMP requests with Paessler SNMP Tester for free. Run simple SNMP requests against a device in your network, testing each single step of the SNMP request as it is logged into a logfile for analysis.
Packet Analyzer Pro edition is an advanced packet analysis and sniffing tool with powerful protocol decodes capabilities. It captures analyze traffic passing by the machine where the tool is installed with results displayed in simple English.