Kompyte - Track & analyze competitors in real time.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
BuiltWith - Find out the technology behind websites
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Vistaar - Vistaar is an innovator of price and revenue management solutions. Vistaar’s pricing software enables companies to achieve pricing best practices through price analytics, price optimization, price list management, and deal management.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.