Diagram Designer is a vector graphics editor that allows you to create UML class diagrams, illustrations, flowcharts and slide shows. Developed by Meesoft
License: Free
Enterprise Architect is a comprehensive modeling tool with advanced features suitable for large projects and teams, while Diagram Designer is a lightweight, user-friendly tool ideal for quick diagramming and smaller tasks. The former excels in collaboration and documentation, while the latter focuses on simplicity and ease of use.