The tools have different approaches to testing and thus have different sets of features. Generally they are used to maintain and plan manual testing, run or gather execution data from automated tests, manage multiple environments and to enter information about found defects.

Some of the most popular software testing tools, a few of which you have probably heard of, include Selenium, Katalon Studio, Silk Test, Squish, TestComplete, Ranorex, Appium, and EggPlant. A few of these are on my list if you are looking for further details

Selenium is an open-source tool that automates web browsers. It provides a single interface that lets you write test scripts in programming languages like Ruby, Java, NodeJS, PHP, Perl, Python, and C#, among others.