Xenu's Link Sleuth - Xenus Link Sleuth checks Web sites for broken links.
Exposely - Immediately reach the largest audiences.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Mustr - Mustr is a public relations platform that helps the media team in organizing the network of journalists and bloggers and maintaining relations with them.
Scrutiny - Scrutiny for Mac helps you manage and improve any number of websites. Link check, search, full website spell check, XML sitemap generator, SEO audit
Crowdly - Crowdly is a social advocate management platform, helps brands find, rank and engage their top advocates on Facebook.