Dr. Link Check - Broken link checker with malware and parked domain detection
Smaller - Make your websites load faster
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
Website Grader - Grade your website's strengths and weaknesses in seconds.
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...