Dr. Link Check - Broken link checker with malware and parked domain detection
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.