Messenger Video Calls - Facebook Messenger, now with HD video calls
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
CallKite - Your website’s video call center in just one click.
LightShot - The fastest way to take a customizable screenshot.