Oracle Application Testing Suite - Oracle Application Testing Suite is a comprehensive, integrated testing solution for web applications and services.
Apache JMeter - Apache JMeter™.
Tricentis NeoLoad - Tricentis NeoLoad is an Enterprise Performance Load Testing platform that provides hardware-based performance simulations and can simulate web services, databases, file servers, and virtualized environments.
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.
SMARTBEAR ReadyAPI - SMARTBEAR ReadyAPI is one of the legit and professional automated testing API platforms that allows teams to create and run automated security tests for APIs and SOAP APIs.
TestRail - TestRail provides comprehensive test case management for software testing. Organize your testing, boost productivity, get real-time insights, and track progress toward milestones. Integrates with leading issue tracking and test automation tools.