Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Timewatch - Timewatch offers time tracking, expense management, resource scheduling and professional services automation solutions.
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
Office Timesheets - Professional Services Automation
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
Krow - Krow Software is a professional service automation solution.