Xenu's Link Sleuth - Xenus Link Sleuth checks Web sites for broken links.
Monitor Backlinks - Easy Link Management - SEO Tool for automatically checking your backlinks.
Integrity - Feature comparison of link checkers for Mac: Integrity, Integrity Plus and Scrutiny
Botify - Traffic Managers, SEO Managers, Webmasters:Crawl your site to extract all of its metadata and identify areas for improvement
SiteCheckerTool.com - Website Analytics & Tools
Topvisor - All in one SEO and PPC tools for better marketing.