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

BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop

Shutter - Shutter is a feature-rich screenshot program.

coconutBattery - With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS devices (iPhone, iPad)

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

GSam Battery Monitor - Monitor your android devices battery usage.