Greenshot is a free and open-source screenshot tool designed for Windows. It allows users to capture screenshots of their entire screen, specific windows, or selected regions. The software offers various editing features, enabling users to annotate, highlight, and add text to their images before saving or sharing them. In addition to basic screenshot capabilities, Greenshot integrates with popular applications like Microsoft Office and Jira, making it easier to share images directly. The tool is lightweight and user-friendly, making it suitable for both casual users and professionals who need to capture and edit screenshots efficiently.