Siteimprove - Consider the Siteimprove Intelligence Platform the newest member of your team.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Adobe Experience Manager - Adobe Experience Manager is a cross-platform CMS that works across websites, mobile apps and on-site displays.
Dead Link Checker - Check for broken links on any website
Hearsay Social - Hearsay Social
Pulno - SEO Audit and Website Analysis. Pull up your SEO.