Selenium is the mainstream open source tool for browser side testing, but there are many alternatives. Canoo Webtest is a great Selenium alternative and it is probably the fastest automation tool. Another Selenium alternative is Watir, but in order to use Watir QA Tester has to learn Ruby.
Selenium Robot Framework is another alternative tool for Selenium. In addition to this, there any many other tools available for test automation.
- QTP (Quick Test Professional)
- Telerik Test Studio
- Rational Functional Test