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 load types. [Open Source, BSD-like]
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]
JBlitz: Web stress, load and performance testing tools for testing websites, web services and web enabled applications. By Clan Productions. [Commercial]
Load Testing Tools Resources: Tools that can help a website or intranet application developer to ensure that it sustains the desired load.
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]
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]
OpenDemand Systems, Inc.: Web performance management software and services including stress testing, performance monitoring, and professional services.
OpenSTA: Project to build a distributed Web load testing architecture based around CORBA. [Open Source]
PerfectLoad: A HTTP/Java load-testing tool that simulates thousands of users executing requests against a Web or application server. [Shareware]
PerformanceTester.com: A resources site by Stens Consulting Inc. Offers articles, FAQs, books, a forum, a knowledge base, links and news.
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.
Performax, Inc.: Provides software load testing, performance analysis, tuning, optimization, and characterization services. The applied methodology is presented as well as several customers.
PerfTestPlus, Inc.: Offers software-testing-related services and, on its site, articles and presentations about performance testing written by Scott Barber.
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]
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]
Quotium Technologies: Range of professional web load and database testing and monitoring solutions.
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]
Test Today, Ltd.: Performance testing of computer-based business systems using automated testing and monitoring technologies.
TestingMaster: A load and stress testing tool that provides a way of testing web sites and intranet applications via web interface. [Commercial, trial version]
Tevron: Offers automated testing solutions for Windows platforms and focuses on load testing, application monitoring and functional testing for various enterprise applications. [Commercial]
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]
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 version]
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]
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 version]
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]
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]
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]