Wireshark Network Protocol Analyzer
- Network protocol analyzer for Windows and Unix that allows examination of data from a live network, or from a capture file on disk.
- http://www.wireshark.org/

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.chipweb.de/knoll/diploma/

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/

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/

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

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

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/

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/

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/

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

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/

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/

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

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/

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/

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

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

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

CATC
- Provides test and measurement solutions for computer I/O, storage and networking protocols, enhancing productivity and time to market.
- http://www.catc.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/