Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
TargetProcess - Agile Project Management Web Application
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Plan.io - Planio makes web based project management and team collaboration more efficient and fun. It is the perfect platform for your projects, team members and clients.
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
Interakt.co - Convert customer engagement into revenue.