Truwex Online 2.0 is an excellent accessibility validation tool, by Erigami LTD, which aims to create a very complete report on Section 508 and WCAG Accessibility, Privacy, and website Quality. The tool is very easy to use, by simply entering URL it provide you a set of tabs : Properties, Issues, Map, Inventory, and profile. Best of all is the map view, which show you a list of issues found on the sidebar and when you click on every issue it will be highlighted on the website. Very useful to view and understand better the different accessibility problem in any website. More than accessibility, Truwex Online can help to detect privacy issues, while I don't know why external links are considered in privacy. I think it will be annoying if we alert user every time he want to click and leave the website, thought it is for what links are useful for.