Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Xenu's Link Sleuth - Xenus Link Sleuth checks Web sites for broken links.
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
SiteCheckerTool.com - Website Analytics & Tools
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
LinkChecker - LinkChecker is a free, GPL licensed website validator.