Postman - The Collaboration Platform for API Development
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.
Postwoman - An online, open source API request builder
Cucumber - Cucumber is a BDD tool for specification of application features and user scenarios in plain text.
Ranorex - Ranorex is a GUI test automation framework for testing of desktop, web-based and mobile applications.
DreamCatcher Agile Studio - DreamCatcher Agile Studio is a centralized, dynamic and visually managed System of Record for product requirements and design related data, replacing Word and Excel documents.