PerfectLoad
- A HTTP/Java load-testing tool that simulates thousands of users executing requests against a Web or application server. [Shareware]
- http://www.perfectload.com/

CAPAF, the Composite Application Performance Assurance Forum
- A knowledge platform, a discussion space and information source on performance assurance of Service Oriented Architecture and composite applications.
- http://www.capaf.ch/

StressTester
- An performance testing tool for any web, asynchronous or SQL application with information on current clients and a partner program. The tool allows testing with no scripting. [Commercial]
- http://www.stresstester.net/

Webload
- A community site for professional performance testing of internet applications, hosting the free WebLOAD Open Source project. The project seeks to enhance WebLOAD and share performance testing knowledge.
- http://webload.org/

RadView Software Inc.
- Developer of web application testing and analysis software to verify the performance, scalability, and integrity of e-business applications. [Commercial]
- http://www.radview.com/

Vantage Analyzer
- An monitor which provides a visual landscape display of J2EE and .NET component-based performance metrics, component interactions, and analysis of performance short-comings. Online interactive demo. [Commercial]
- http://www.compuware.com/products/vantage/vantageanalyzer.asp

Performax, Inc.
- Provides software load testing, performance analysis, tuning, optimization, and characterization services. The applied methodology is presented as well as several customers.
- http://www.iperformax.com/

Web Performance, Inc.
- Load, stress, and performance testing software and tools for Web servers. Interactive reports tell how many real users a Web site can handle at one time and which Web pages are slow. [Commercial]
- http://webperformanceinc.com/

PerformanceXperts, Ltd.
- An independent performance, load and stress testing specialist company with experience of designing and implementing performance testing strategies across many business sectors and technologies.
- http://www.performancexperts.co.uk/

Neotys
- Offers NeoLoad, a testing tool for web applications which provides monitors and results reports to pinpoint bottlenecks and performance issues, as well as application deployment services. [Commercial, trial version]
- http://www.neotys.com/

PerfTestPlus, Inc.
- Offers software-testing-related services and, on its site, articles and presentations about performance testing written by Scott Barber.
- http://www.perftestplus.com/

Testing Master
- A load and stress testing tool that provides a way of testing web sites and intranet applications via web interface. [Commercial, trial version]
- http://www.siteloadtesting.com/

OpenDemand Systems, Inc.
- Web performance management software and services including stress testing, performance monitoring, and professional services.
- http://www.opendemand.com/

Test Today, Ltd.
- Performance testing of computer-based business systems using automated testing and monitoring technologies.
- http://www.test2day.co.uk/

The Grinder
- A Java load-testing framework. It has support for testing HTTP based services and can also be used to test MOM and POP3, SMTP, FTP, and LDAP applications. [Open Source, BSD-style license]
- http://grinder.sourceforge.net/

PureLoad
- A Java-based performance testing and analyzing tool that helps application developers by automating the process of stress testing server applications. [Commercial, trial version]
- http://www.minq.se/products/pureload/

Apache JMeter
- Graphical server performance testing tool, for both static and dynamic resources (files or CGI, Servlets, Perl scripts). It may be used to simulate a heavy load on a server or network to test its strength or to analyse overall performance under different
- http://jakarta.apache.org/jmeter/index.html

Webserver Stress Tool
- A HTTP-client/server load, stress and performance testing application designed to pinpoint critical issues in Web server that may prevent optimal performance. By Paessler GmbH. [Commercial, trial version]
- http://www.paessler.com/webstress

OpenSTA
- Project to build a distributed Web load testing architecture based around CORBA. [Open Source]
- http://opensta.org/

Quotium Technologies
- Range of professional web load and database testing and monitoring solutions.
- http://www.quotium.com/

Tevron
- Offers automated testing solutions for Windows platforms and focuses on load testing, application monitoring and functional testing for various enterprise applications. [Commercial]
- http://www.tevron.com/

Zyntax Tuxedo Adaptor
- The Tuxedo Adaptor allows users to perform load, stress and performance benchmarking against applications which utilize BEA's Tuxedo. The software is solely available included in IBM/Rational testing products. [Commercial]
- http://www.zyntax.com/zta.php

Web Application Load and Stress Testing
- WAPT is a load and stress testing tool for web sites and intranet applications with web interface. Accurate load simulation, run-time test data generation, recording and play back of secure HTTPS requests, clear graphs and reports. [Commercial, trial vers
- http://www.loadtestingtool.com/

Red-Gate Software: .NET testing tools
- The Advanced .NET Testing System (ANTS) is for load and scalability testing of .NET web services and other web applications. [Commercial, trial version]
- http://www.red-gate.com/products/dotnet_tools_overview.htm

Facilita Forecast Applications
- A suite of low footprint load testing tools for web, .NET and Java applications as well as for networks, databases and custom C, C++, .NET and Java APIs. [Commercial]
- http://www.facilita.co.uk/

LoadeaTest
- A stress test tool which offers to test performance from capturing to analyzing results. The application is available for Windows platforms equipped with the .NET runtime environment. [Commercial, free restricted version]
- http://www.loadea.com

Load Testing Tools Resources
- Tools that can help a website or intranet application developer to ensure that it sustains the desired load.
- http://www.load-testing-tools.com

Proxy Sniffer
- Web load testing and site analysis tool implemented in Java, permitting to test and analyze the performance characteristics and the stability of Web applications under various load conditions. [Commercial, free limited version]
- http://www.proxy-sniffer.com/

WebInject
- A tool for automated testing of web applications and services. It can test individual components with HTTP interfaces, and is a test harness to create a suite of automated functional and regression tests. [Open source, GPL]
- http://www.webinject.org/

Web Site Optimal Performance (WSOP)
- This tool checks the consistency of a web site and makes a load time analysis for all page elements. It provides a set of reports and statistic layouts representing web page download information. Available for various Windows platforms. [Commercial, trial
- http://www.web-site-test.com/

JBlitz
- Web stress, load and performance testing tools for testing websites, web services and web enabled applications. By Clan Productions. [Commercial]
- http://www.clanproductions.com/jblitz/