Selenium IDE
Open Source record and playback test automation for the web
...Run your tests on any browser/OS combination in parallel using the Command-line Runner for Selenium IDE. Getting started with Selenium IDE requires no additional setup other than installing the extension on your browser. One of our driving philosophies is to provide an easy-to-use tool that will give instant feedback. We believe that the easier we can make it, the more likely people are to author tests, which in turn results in better-tested apps. Selenium IDE records multiple locators for each element it interacts with. If one locator fails during playback, the others will be tried until one is successful.