LANSleuth  
   Protocol analyzer that monitors LAN networks, decodes multiple Ethernet protocols and keeps network statistics. Product information, FAQ, updates, and a demo version.
   http://www.lansleuth.com

IPTraf - IP Network Monitor  
   Console-based network statistics utility for Linux that gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts.
   http://cebu.mozcom.com/riker/iptraf/

Catc: Bus & Protocol Analyzers, Test & Measurement Equipment, Networking Products  
   Catc is the foremost provider of test systems and networking devices supporting USB, IEEE 1394, Bluetooth, Protocol Analyzers, Bus Analyzers, Ethernet, Network, ASIC, Development Tools, Test Equipment, and Communications.
   http://www.catc.com/

Sniffer Technologies  
   Network monitoring, analysis, reporting and capacity planning tools.
   http://www.sniffer.com/

Vector CANtech, Inc.  
   Controller area network(CAN) analysis can tools (CANalyzer, CANoe, CANcardX) and training, integration, source code services.
   http://www.vector-cantech.com/

Amoeba Telecom  
   Provides a suite of convergence traffic analysis tools for telecom, Internet, and mobile Internet protocols. Company and product information, white paper, and FAQ.
   http://www.amoebatel.com

Broadframe Corp.  
   Broadframe Corporation delivers network-level broadband tools for cost-effective development, test, and demonstration of broadband products, including DSL protocol analyzers and DSL network simulators.
   http://www.broadframe.com/

datacomsystems.com  
   Increased network visibility through Matrix switches for Fiber, ATM, Gigabit, 100BaseFx, Ethernet and Token Ring technologies partnered with Network Associates Sniffer Technology. The best in analytical switching solutions.
   http://www.datacomsystems.com/

Frontline Test Equipment  
   The leader in affordable, PC-based serial, Ethernet, Bluetooth, Industrial Automation, and SCADA data communication protocol analyzers and test equipment.
   http://www.fte.com

Logix Communications  
   Developers of network analysis tools for WAN, LAN and InterNetworking specializing in protocol analyzers and traffic monitors. Includes description of products, technical information, and evaluation copies for download.
   http://www.logixcomms.co.uk/

Pulse website home page  
   Pulse is a worldwide provider and distributor of Data Communications, WAN, Computer Networking Equipment, Signaling Conversion and Wireless solutions.
   http://www.pulsewan.com/

TrafMeter  
   IP traffic accounting and Network monitoring software for small to medium size LANs. Product information, online documentation, FAQ, and 30 day trial.
   http://www.lastbit.com/trafmeter/

ATM Analyzer as PCI card  
   ATM Analyzer as PCI card to be used in cheaply available PCs. Any Linux or Windows PC can be used for monitoring and testing purposes on ATM networks. The board and device driver design was done by Thomas Knoll in the course of his Diploma thesis.
   http://www.infotech.tu-chemnitz.de/~knoll/diploma/

Protocol-analyzers.com  
   SCSI and Fibre channel protocol analyzers, test equipment and diagnostic software.
   http://www.protocol-analyzers.com

Sniff'em | Next Generation Packet Sniffer  
   Sniff'em an promicious Packet Sniffer. A next-generation network protocol analyzer or sniffer, Sniff'em allows the network administrator to capture and retrace the steps of any network user with never before seen ease.
   http://www.Sniff-em.com/

Network troubleshooting  
   Network testing solutions for troubleshooting, protocol analysis and monitoring of your LAN, WAN, ATM networks. Analysis and performance tools for fax and voice over IP-VoIP.
   http://onenetworks.comms.agilent.com/

CommView Packet Monitor  
   A program for monitoring network activity capable of capturing and analyzing packets on an Ethernet network or dial-up connection. This sniffer can run on any Windows 95/98/Me/NT/2000 system.
   http://www.tamos.com/products/commview/

Ethereal Network Analyzer  
   Network protocol analyzer for Unix that allows examination of data from a live network, or from a capture file on disk.
   http://www.ethereal.com/

APS Linux Packet Sniffer  
   Free packet sniffer for linux, written in C. Compiles under Slackware, Debian GNU-Linux, TurboLinux 4.x.x and most SuSE/RedHat versions.
   http://www.swrtec.de/clinux/

LinkFerret Network Monitor  
   Real time Ethernet packet sniffer and protocol analyzer for Windows-based systems.
   http://www.linkferret.ws/index.htm

EtherDetect - Connection-oriented Packet Sniffer  
   Protocol analyzer to monitor, capture and analyze network packets. This sniffer provides a view for TCP connections and UDP threads.
   http://www.etherdetect.com

Packetyzer  
   Captures packets on network, shows data of application layer together, and provides TCP flow view.
   http://www.packetyzer.com/

Ettercap  
   Ettercap is a multipurpose sniffer/interceptor/logger for switched LAN. It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis.
   http://ettercap.sourceforge.net/

EffeTech HTTP Sniffer  
   Provide a HTTP protocol network sniffer, packet analyzer and file rebuilder. It is dedicated to capture IP packets containing HTTP protocol, rebuild and save the HTTP communications and files sent through HTTP protocol.
   http://www.effetech.com/sniffer/