Exposely - Immediately reach the largest audiences.
Xenu's Link Sleuth - Xenus Link Sleuth checks Web sites for broken links.
Crowdly - Crowdly is a social advocate management platform, helps brands find, rank and engage their top advocates on Facebook.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Jamballa - Jamballa is a platform that enables brands to reach bloggers and influencers more easily to promote their products and services, and to reach the targeted audience.
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