1) Fiddler
Fiddler (almost) is the best free web tool for any platform and any operating system,
and offers some of the most popular key features. Such as: Performance testing, capturing records HTTP/HTTPS request response, Web debugging and many other functions.
2) Nagios
Nagios is another free online monitoring tool on the Internet.
It is an open source monitoring solution that delivers exceptional performance and continues to provide reliable monitoring for thousands of organizations around the world.
3) Nedi
Nedi is also an open source network monitoring tool for users.
Nedi can unleash its full potential on your core network devices for CDP, FDP, or LLDP. It can also include other network components that can work very well when they are located on the network boundary.
4) Easynetmonitor
A minimal free tool to monitor your computer's network between local and Internet hosts.
To start our easynetmonitor, open the pop-up menu to see your computer's network status information.
Free Network monitoring Easynetmonitor is a small and easy-to-use tool for testing network arrival rates between remote hosts and other network hosts.
Simply click on the easynetmonitor icon to get real-time information about your local network and your Internet host.
5) Microsoft Network Monitor
This is Microsoft. Network Monitor 3.4 Stable version of the non-Development Protocol Analyzer provides the web monitoring tools. Microsoft Message Analyzer replaces network monitoring 3.4.
Microsoft Message Analyzer provides up-to-date protocol analysis such as capture screen, display, Protocol message traffic analysis, events, and troubleshooting and diagnostic scenarios for other system or application messages.
This is a more powerful tool to capture and parse protocol messages.
6) Cacti
CACTI is a complete network drawing solution designed to take advantage of RRDtool's data storage and graphical rendering capabilities.
Cacti provides a fast polling, advanced graphics template, multiple data acquisition methods and user-managed out-of-the-box features.
All packages provide a very intuitive, easy-to-use interface for the installation of complex networks of hundreds of devices within the LAN.
7) Zenoss
The core of Zenoss is to provide some key features for enterprise IT monitoring tools:
Cross-platform device performance and availability monitoring
Highly customizable web-based consoles and dashboards
Device discovery, modeling, and classification
Three Layer network topology diagram
The Best data collection
Error and event monitoring and management
Event classification, data deduplication, auto-zeroing, mapping transformations, and lifecycle management
Event triggering and notification
Availability monitoring of devices, networks, processes, and services
8) Paessler
Paessler is a powerful and easy-to-use network monitoring software.
PRTG Network Monitor runs on a network of Windows machines and collects various statistics about the machines, software and devices you specify.
PRTG comes with an easy-to-use web interface click Configuration. You can easily share data to non-technical colleagues and customers, including through live maps and custom reports.
9) Bandwidthd
BANDWIDTHD can track the utilization of subnets using TCP/IP networks and building HTML file graphs.
) Icinga
Icinga is a network monitoring tool that handles multiple services, multiple devices, and complex dependencies between them. There is no need for complex installation or maintenance monitoring systems.
One) the Dude
The Dude Network Monitor is a new application provided by Mikrotik, which can greatly improve your management of your network environment.
It will automatically scan all devices within the specified subnet, draw maps and layout your network, monitor the service's devices and remind you to prevent some service problems.
Total Network Monitor
Total Network Monitor is a free network monitoring software that provides continuous monitoring of local networks, personal computers, and services that require careful observation and in-depth control.
Original link: http://devzum.com/2015/01/28/top-12-best-free-network-monitoring-tools/This article belongs to reprint, the real content please self check
Top Monitoring Tools (12 free network monitoring tools)