A commercially supported, open-source distribution of the popular web application test automation tool Selenium Remote Control. Built by the original author of the Selenium, Sauce RC is easy to install and has the latest fixes and browser support.
LogCrawler is an ANT task for automatic testing of web applications. Using a HTTP crawler it visits all pages of a website and checks the server logfiles for errors. Use it as a "smoketest" with your CI system like CruiseControl.