ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
LiquidText - LiquidText improves upon the reading experience by allowing users to better synthesize, visualize and collaborate over digital text.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Clipdrop - Create stunning visuals in seconds
LightShot - The fastest way to take a customizable screenshot.
Slack E-mail Add-ins - Quickly forward emails and attachments to Slack