Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Communifire - Enterprise Social Collaboration Software
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
LS Intranet - LS Intranet is a corporate intranet that facilitates multiple employees collaborating on projects, and working in synergy.
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
Unily - Unily is a cloud-based intranet solution designed by SharePoint consultancy BrightStarr.