Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
DevTest - Test management solution for efficient quality assurance
TestComplete - TestComplete Desktop, Web, and Mobile helps you create repeatable and accurate automated tests across multiple devices, platforms, and environments easily and quickly.
dotCover - JetBrains dotCover is a .NET unit test runner and code coverage tool that integrates with Visual Studio.
Katalon - Built on the top of Selenium and Appium, Katalon Studio is a free and powerful automated testing tool for web testing, mobile testing, and API testing.
ReadyAPI Performance - ReadyAPI Performance is a platform that offers Load Testing for REST and SOAP APIs, Microservices, and Databases.