httest - The httest provides a large variety of HTTP-related functionality, useful for implementing all...

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.

Screenster - 10x faster UI testing without a line of code.

SlimerJS - A scriptable web browser for web testing, web scraping, network monitoring...

Cypress.io - Slow, difficult and unreliable testing for anything that runs in a browser. Install Cypress in seconds and take the pain out of front-end testing.

iMacros - iMacros allow you to record the most tedious and common actions you take on your browser and automate them to simplify the routine of your life.