Integrity Plus fills the gap between Integrity, the free no-frills link checker, and Scrutiny, the webmaster tools suite. If you manage more than one site then Integrity Plus allows you to store settings for each site and switch between them. It generates a sitemap in xml and a variety of other formats. it also adds a search box and filter button to help you search your data.
Version 6 is faster and leaner. It also separates the engine from the UI so that the engine can be made available to other developers.