App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.

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

Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.

Shutter - Shutter is a feature-rich screenshot program.

App Store Optimization (ASO) Checklist - ASO tools for increasing app installs & organic traffic 📈

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