Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
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
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
LightShot - The fastest way to take a customizable screenshot.