Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ClickMeeting - Collaborate with partners and clients using ClickMeeting professional web conferencing software. Try it now, FREE!
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
Zoho Cliq - Team chat that's built for work
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
GoToWebinar - Webinar & Online Conference | GoToWebinar