Integrity - Feature comparison of link checkers for Mac: Integrity, Integrity Plus and Scrutiny
Xenu's Link Sleuth - Xenus Link Sleuth checks Web sites for broken links.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
SiteCheckerTool.com - Website Analytics & Tools
Link Evaluator - Link Evaluator is a Firefox extension designed to help users evaluate the availability of online...