Testing is one of the most important and unavoidable step of software development. To test the performance of any software there are a number of ready to use tools in both licensed and open source versions.For 2017 the most used performance testing tools are listed below:JMeter ToolJMeter is one of the mostly used and popular open source performance testing tools. Apache JMeter is basically used o test Java applications and the tool is designed to test the load and to measure software performance at that time. It can be considered as an alternative of Load Runner tool. The tool is designed to test the thick client Java application. Testers can find all of the required features, needed to test an application in JMeter tool. A few of the popular features of this tool are:A User Interactive and featured IDE, which can be used for debugging, recording and building the performance testIt is one of the most trusted and used Performance testing tool.Use Groovy as the default programming languageIs compatible and can test the hosting technologies, including Java Objects, SOAP, Resy Services, Databases with JDBC and FTP like services.JMeter is a popular software, but has a few shortcomings as well e.g. it cannot test large scale distributed applications. To test the application, which require multiple machines JMeter cannot be a suitable testing tool. During qa testing training you will get all information about Jmeter and more toolsTaurus is again a testing tool, which uses YAML language. A ten line script can be described before testing; using which the testers can test the software either through JSON or YAML language. In YAML language the user can describe a readable and edible test approach using simple text file. Following are a few of the useful features of Taurus:It is a perfect performance testing tool for CI\/CD pipeline.It can be supposed as an abstract of JMeter and of some other useful sub tools as well like Gatling, Locust, Grinder and Selenium as well.This tool allows all team members to contribute in the test process, as the test case in written in simple language so everyone can read it and perform the testing process easily.LocustIt (Locust) is the simple to use load testing tool and can perform testing in distributed environment. The tool is mainly used to test websites and other web applications. You can also test that how many users can simultaneously use the application. For each instance stringing pulley blocks of the Locust separate behavior can be defined, through which you can monitor the application. performance in real time. Some of the useful features of Locust:Using Python language various test scenarios can be createdA nice web based user interfaceBest tool to test APIsAny number of users can be scaled up.The GrinderThis is a Java load testing framework and provides an easy to run testing solution for a distributed environment. A number of load injector machines can be used to create distributed testing solutions. The Grinder has following features:The Grinder can be used on any system, which has Java APIIt has a nice GUI consoleIt can automatically handle the client&rsquo;s cookies and connectionsnGrinder GrinderThis is a Github tool, which can provide an enterprise level testing solution. The stress testing can be made easy and it can provide a new platform, where you can create, monitor and execute tests. This Github testing tool comes with following features:The language used in nGrinder is Jython to create the test scenarios and the stress testing can be done against JVM platform.It can use customer libraries like py and jar to extend the testingYou can monitor the testing state of your performance agents.Apart from the above listed there are man other ready to use testing tools, which are used by the testers and are open source as well. One can easily download these tools and use them. Some other tools are Siege, Tsung, k6, Gatling, The Grinder and Fiddler. These tools can be used by developers or testers and they can easily test any web or desktop application.