MRTG Multi Router Traffic Grapher
- Free network traffic monitoring system which displays the results as graphs on the Web.
- http://oss.oetiker.ch/mrtg/

Visual Pulse
- A server-based ping engine and reporting tool which provides visual traceroute information to servers or sites being monitored.
- http://www.visualpulse.com

Change Notes
- Free service monitors the web pages that interest you and notifies you by email when they change.
- http://www.changenotes.com/

Gomez, Inc.
- Website and web application performance monitoring tools, services, and solutions.
- http://www.gomez.com/

Axiom Toolworks
- Describes its product range.
- http://www.axiomtoolworks.com/

IIS Tracer
- Real-time monitoring tool for Microsoft IIS Server. Describes its capabilities with example logs, reviews and installation instructions.
- http://iismonitor.pstruh.cz/

Site Vigil
- Lets you monitor one or more web sites detecting inaccessible pages, position on search engines, missing pages, unexpected surges or lulls in hits on your web site, error reports and new references.
- http://www.sitevigil.com

Webwatchbot
- Monitoring and analysis software for web sites and IP devices.
- http://www.exclamationsoft.com/webwatchbot/

Event Tracker
- Provides device monitoring, security monitoring, and event log monitoring for Windows servers.
- http://www.eventlogmanager.com

Source Internet Marketing Group
- SIMG Software specializes in security and privacy solutions; ranging from powerful Computer and PC network monitoring and filtering to spam protection and secure data storage software.
- http://www.sourceinternetmarketing.com

RobotTracker
- A freeware php tool to follow in real time the crawler activity on your website. Reports monthly, daily and by url.
- http://www.alpmedia.com/submit/robotTracker

Site Probe
- Tool that checks the status of a website hourly. Free limited option available.
- http://www.siteprobe.com/

Izlenim Site Monitor
- A tool for Windows that keeps an eye on websites to see if they are accessible on the net. When a site goes down, you can choose to be alerted with an audible alarm, E-Mail or ICQ Pager.
- http://www.izlenim.com/shareware/sitemonitor.asp

Enlyght Software
- Offers various monitoring tools. Profile, product range, dealers and downloads.
- http://www.enlyght.com

Integral Technology Solutions
- Integral provides software, professional services and training to enhance the monitoring and health of production systems built on BEA WebLogic and BEA Tuxedo.
- http://www.integral-techsolutions.com

ipMonitor
- Web-based monitoring software for networks and servers that continuously tests availability and responsiveness. Features administrator alerts, task automation, auto-recovery solutions, and activity reports.
- http://www.ipmonitor.com/

Generic Systems Supervision
- Information Society Project (IST-2001-34162), which aims to define and implement a middleware architecture for generic system supervision.
- http://genesys.sztaki.hu

Web Accounting
- Offering performance monitoring of web services, HTTP/1.0 and HTTP/1.1
- http://www.webaccounting.com/

Alert Site
- Offers monitoring systems for web servers and email servers. Profile, services and product range.
- http://alertsite.co.uk

Web Site Monitoring by Keynote Red Alert
- End-to-end web site monitoring service that performs checks on any web server and alerts via pager, email or cell phone when problems are detected.
- http://www.redalert.com

Page Patrol
- Monitors performance and checks for defacement.
- http://www.pagepatrol.com/

ServersCheck
- Service remotely monitoring and alerting on availability and performance of web sites and other Internet systems.
- http://www.serverscheck.com

Atomic Watch
- Website Monitoring Software.
- http://www.info-pack.com/awatch/

Monitor-Lizard
- 24x7 web site monitoring for Internet-based businesses
- http://www.monitor-lizard.com/

eIQ Networks
- Provides analysis, reporting and performance management solutions for enterprise applications and network infrastructure.
- http://www.eiqnetworks.com

WebSite Watcher
- Checks an unlimited number of web-sites for updates and changes with a minimum of time and online-costs.
- http://aignes.com/

PageSentry
- Internet server monitor for Macintosh tests Web, SMTP, FTP, AppleShare, and other servers.
- http://www.maxum.com/Pagesentry/

Inmetrics
- Provider of IT monitoring products, application monitoring products and SPB monitoring products.
- http://www.inmetrics.com.br

KnightGuard.Net
- Monitors Web Sites 24x7 and notifies you immediately if there's trouble. User configurable options. Free trial available.
- http://www.knightguard.net

Packeteer
- Provider of application-intelligent performance solutions that protect, control, and accelerate mission-critical applications over the WAN and Internet.
- http://www.packeteer.com

SimpleCheck 1.1
- Command line utility for Win NT/2000/XP that checks if a remote server answers correctly to a request on a given TCP port. Internet connection monitoring possible.
- http://www.simplescripts.de

PureAgent
- Monitors response times from the agent to a server, by replaying transactions at specified intervals. This includes static and dynamic web applications as well as other server applications.
- http://www.minq.se/products/pureagent/

Evaliant Media Resources
- Providing online advertising data.
- http://www.evaliant.net/

Webmonitor
- Service monitors websites and then alerts of down time.
- http://www.drobinson.com.au/webmonitoring/

Worldwide Ads
- Monitor and chart the availability/performance of your devices and services through 7x24 monitoring of applications, and IP related equipment.
- http://www.wads.com/monitoring.html

Argent Software
- System Management Solutions Suite providing Network Monitoring and Alerting, Web Site Monitoring, Performance Monitoring, Capacity Planning, Stress Testing and Automated Job Scheduling for Windows NT/2000.
- http://www.argent.com/

Treno
- Traceroute RENO is a network testing tool designed to test network performance under load similar to that of TCP.
- http://www.psc.edu/networking/treno_info.html

TTCP
- Useful for network performance testing with both TCP and UDP. Site is just an FTP page.
- ftp://ftp.arl.mil/pub/ttcp/

Trio Networks
- Tracks end-to-end download speed and reliability for all pages and all visitors. It measures real not synthetic transactions.
- http://www.trionetworks.com/

BMC Software
- Corporate home page with full range of product descriptions, Patrol and SiteAngel are the enterprise level monitoring products.
- http://www.bmc.com/

Speed-Trap
- Unique client-side, real-time monitoring and analysis of your websites usage, usability and performance.
- http://www.speed-trap.com/

Hypertrak
- Measures quality of service. Also contains a small section on market research and some whitepapers.
- http://www.hypertrak.com/

WebTelemetry
- Network monitoring tool with a Java interface, paging server, and a wireless web client.
- http://www.webtelemetry.com/

PingALink
- This free version will monitor your web site by accessing it and checking to see that everything is Ok. If there is an error it will immediately send you an e-mail alert
- http://www.pingalink.com/free/

Paessler GmbH
- Builds network infrastructure software to test, monitor and analyse factors such as server load and uptime, traffic and performance.
- http://www.paessler.com/

PIKT
- Freeware Linux utility, not only monitors but fixes problems automatically whenever possible.
- http://pikt.org

Orca
- A tool for plotting arbitrary data from text files onto a directory on a Web server.
- http://www.orcaware.com/orca/

Empirix
- Company offering testing and monitoring solutions for web, voice, and network applications.
- http://www.empirix.com/

Uptime99
- Monitors your website once an hour, 24-hours a day.
- http://www.uptime99.com/

Porivo Technologies
- Web performance testing solutions that measure the end-to-end speed of Web sites from all geographies and connection types - from dialup through fast broadband connections.
- http://www.porivo.com

SPIS WebWatch
- Web site monitoring software that includes a problem notifier.
- http://www.spis.co.nz/webcentr/webwatch.htm

Visualware
- Internet performance management tool that analyzes Internet connectivity and network performance.
- http://www.visualware.com/visualprofile/index.html

Ixacta
- Graphical monitoring tools that assist visualization of website performance data.
- http://www.ixacta.com

Keynote
- Enterprise monitoring solutions for large e-commerce sites.
- http://www.keynote.com

Holistix
- Considers the performance of subsystem components while monitoring the whole of the site. Includes product demo.
- http://www.holistix.net/

TCPTrace
- Analyzes the dump file format generated by tcpdump and other applications. Tracks host sessions and graphs rate of traffic.
- http://www.tcptrace.org/

PLUTO
- Perl-based robot that monitors the accessibility of a web server.
- http://bentoni.com/PLUTO/