Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

ChurnBuster - Stop Losing Money toFailed Payments in Stripe. Churn Buster saves you thousands of dollars every month by ensuring your customers update their payment information.

Shutter - Shutter is a feature-rich screenshot program.

ClearBrain - Predict which users will upgrade or churn tomorrow.

Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image

ChurnTarget - ChurnTarget helps you reduce your SaaS churn by targeting customers that will soon churn. Using intelligent churn prediction, we will alert you on the customers that are at risk of churning, so you can reach out to them and prevent them from leaving.