What Online UML Tool Supports Drag-and-Drop to Associate Elements?

Ralph Garcia answered that Visual Paradigm Online (VP Online) to be is a UML tool that supports drag-and-drop to associate UML elements.

According to Roy, in terms of diagramming capability, Visual Paradigm Online (VP Online) is one of the very best web based drawing tool. It lets you create UML, BPMN, ArchiMate, ERD, DFD, Mind Map and many other diagrams . The diagram editor is so intuitive and with many great editing features that enable user to create diagrams quickly and smoothly.

Ralph listed some key features of this UML tool:

• Clear UI for quick flowchart editing
• Easy to use: Create and connect shapes with drag and drop. Connectors are attached to shape border and will never separate apart (unlike many other tools!).
• Beautiful drawing: Apply different formatting options, which include shape and connectors colors (fill/gradient), 40+ connector types, background color, RTF caption, font options, shadow effect, etc
• Alignment guide helps you position shapes nicely.
• Build your own shape library to create diagrams with your own shapes.
• Start quickly with the pre-developed diagram templates. Hundreds of templates are provided.
• Easily print and export your drawing into different formats (PNG, JPG, SVG, GIF)
• Easily add text, notes, external images, web links to diagram
• Export your drawing as PDF and share with others
• Available on the cloud, compatible with all O/S and browsers
• Visio drawing and stencil import
• Google drive integration

From what Ralph said, VP Online also offers a free edition that supports UML, Organization Chart, ERD and Floor Plan, while the other diagram types are available in higher, paid editions.