Before Dawn Solutions says Better Link Tester Express 1.0.5 (http://www.beforedawnsolutions.com/blt ) is now available in the Mac App Store. It requires Mac OS X 10.5, costs US$9.99 and can be found in the Developer Tools category.
Better Link Tester will verify all of the links and content on your site, and deliver a report when it has completed. BLT will find all of those broken links and display the results in a flat view or a tree view. Once you’re satisfied with the results, you can generate a report in a CSV/text format, HTML, or even export it to OmniGraffle.
BLT honors the robots.txt file on the server that you’re checking, so that it doesn’t get overwhelmed with the additional traffic. You can even change the User Agent so you can check browser specific settings on the server, the code or the HTML.