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Draw.io is a free program for creating diagrams and charts on the Windows platform. It offers a simple and intuitive interface that allows users to easily create professional-looking diagrams of various types. One of the key features of Draw.io is its versatility. It supports a wide range of diagram types, including flowcharts, network diagrams, class diagrams, organizational charts, and more. This makes Draw.io an ideal tool for process design, software development, project planning, and data visualization.