Service - Customer service issues solved for you, on demand, for free.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
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...
LiveMessage from Salesforce - Make mobile messaging a cornerstone of customer service
LightShot - The fastest way to take a customizable screenshot.