This web site presents a list of load testing tools and performance testing software. In the software testing domain, load testing is defined as the process of putting demand on a system or device and measuring its response. When the load placed on the system is raised beyond normal usage patterns, in order to test the system response at unusually high or peak loads, it is known as stress testing. The load is usually so great that error conditions are the expected result, although no clear boundary exists w
JMeter open source load testing test case screen (source http://www.methodsandtools.com/tools/tools.php?jmeter )
The main features that you can find in commercial or open source load testing tools are the creation of realistic performance and load testing scenarios, simulating multiple users, simulating multiple locations, simulating multiple browsers (Firefox, Chrome, Internt Explorer, ...) for web load testing, running load testing and gathering results, load testing results presentation, automated monitoring of servers, automated alerting in case of monitoring issues.
Software Testing Magazine Unit Functional Load Agile DevOps