- Google ChromeDriver
- Mozilla Firefox Geckodriver
- Microsoft Edge WebDriver (Windows)
- Safari Webdriver (OSX, build in, no need for seperate download)
Obviously you first need the browser to be installed on the computer.
Make sure the webdriver which you want to use is in a folder that is in your machines PATH variable. Or make use of clever tools that download this for you, like the webdrivers gem for Ruby.
Selenium-grid: Keep in mind that the webdrivers gem is not going to work here.
Appium: Same for Appium.
Check My blogpost about webdrivers if you want more information about running these with a custom webdirver.