The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links, images, CSS, script and apps from an SEO perspective.
If you need more features than only a website link checker - such as XML sitemap (conforming to the standard protocol), html validity, essential SEO checks such as page title, headings, meta description and keywords - then try Scrutiny.
If you've maintained a website for any length of time, you'll know that links very quickly become broken. Unless you enjoy clicking every single link on your site followed by the back button, then you'll need to use a website crawler like Integrity!
A1 Website Analyzer can crawl websites and collect data to be used for finding site and SEO problems. Filter results to see which URLs are blocked by robots.txt, which are noindex, nofollow, canonical to self, canonical to other, response codes etc.
Link Evaluator is a Firefox extension designed to help users evaluate the availability of online resources linked to from a given Web page. When started, it automatically follows all links on the current page, and assesses the responses of each URL (link).This app doesn't have any features at the moment.Discontinued
The official site is 404 and it is no longer available on the Firefox site as an addon. Just reviewed it for Curlie.org and have deleted it there. I found it reviewed in a few places but not active as a download.