Free types of network traffic software for windows

York Network Trace will show all the traffic in your network. Sniffs packets, files, passwords, web sessions and pictures.
Log source, destination [fqdn or ip address] and packet size of all network traffic on your network, of course also outbound traffic. The network card will be set into promiscuous mode.
Save sniffed HTTP and FTP files. Just for fun, pictures are shown in a slideshow and in a screensaver like window.
Sniff for HTTP, FTP, POP3, SMTP, SMB, VNC and AIM password/hash.
Select a client and follow his clicks in your browser. [WebSession]
Screensaver included. Shows sniffed pictures in a slideshow.
For advanced user: You can capture traffic into a pcap file, send a pcap file and replay a pcap file.
Please note, WinPcap [http://www.winpcap.org] is used to get the network traffic. The Setup will install WinPcap automatically.

Network Traffic Generator is used to check what massive amounts of traffic of certain type will do to an intervening network Network Traffic Generator does not try to measure throughput or response times.
Network Traffic Generator has been made with the question in mind: If 100 clients does simultaneous TCP transfers for 2 days, will my router break? Or can I configure my firewall while 50 people are doing large TCP transfers through the device?
Who should use it?
Responsible software developers in a test environment that needs to know how their router/firewall/VPN holds up against continuous high traffic loads. You should be careful to use this tool only in environments where it will not affect the normal day to day operations of your coworkers.

Microsoft Network Monitor 3.3 offers an effective tool which helps you to capture network traffic, view and analyze it.

Major Features:

1. Be decoupled from the parser set.
2. To install :
   • Run the setup.exe for the platform you are installing.
   • You will be prompted first to install the core engine.
   • Follow the installation directions.
   • Make sure you close existing instances of netmon.exe, nmcap.exe and any running NMAPI applications.
   • Next you will be prompted to install the parser package.
   • Follow the installation directions.
     

Requirements: none

NET Traffic Meter 2.1.2 is known as a useful and favorable application to handle your network traffic and to collect statistics in order to manage and diagnose your home or professional network environment. This product can be downloaded, used for free and does not contain adware or spyware. This product is used by professionals as well as by enthusiasts since 2004. NET Traffic Meter can display real time traffic information about your network, wireless network or modem setup.

Major Features:

1. Monitor any modem or network interface available
2. Customized profiles and automatic adjustment options
3. Display daily, weekly and monthly statistics about your traffic usage
4. Graphical representation of your current volume and usage per month, week, day
5. Export statistics as a Rich Text Document, CSV or even export real-time information to an SQL database
6. Advanced alerts to notify you on specific events.

Network Probe is a free network monitor and protocol analyzer that gives you an instant picture of the traffic situation on your network and enables you to identify and isolate traffic problems. Traffic statistics are graphically displayed in real-time. Windows NT/2000/XP and Linux/FreeBSD/Solaris/MacOS X is supported.