A cross-browser open-source tool to record, develop, debug Selenium scripts as well as identify and validate HTML objects by XPath, CSS, etc.
Video Overview: Youtube link
Discuss and ask any questions: Forum Link
OS: Windows, Linux, Mac OS X
Browsers: Chrome, Internet Explorer, Safari, Firefox
Please note that this is a Selenium based solution.
This means as your browser versions change you need to get latest Selenium jars. See FAQ for more info.