SmartDraw is the smartest way to draw any type of chart, diagram: flowcharts, org charts, floor plans, network diagrams, and more. Developed by SmartDraw.com
License: Commercial
PlantUML is an open-source tool focused on text-based diagram creation, making it ideal for developers and technical users, while SmartDraw offers a more user-friendly graphical interface suitable for business professionals. The choice between them largely depends on user preference for coding vs. visual design.