Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
BuiltWith - Find out the technology behind websites
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
Competera - Competera is a price tracking tool for performance-oriented eCommerce retail and brands of all sizes worldwide.
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Kompyte - Track & analyze competitors in real time.