Integrity checks the links and images on your site. Feed Integrity your homepage URL and it will follow internal links to find all of your pages, checking each link and reporting the server response code for each.
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.
I intend Integrity to remain free and to remain a website link checker, no more no less. Note that Integrity Plus offers more features such as managing multiple sites and sitemap generation. Scrutiny provides further advanced features such as authentication, spelling and grammar checking, and SEO checks.