SequenceDiagram.org is an online application for creating, managing, and sharing sequence diagrams. Sequence diagrams are used to visualize communication and collaboration between objects in software development. The SequenceDiagram.org application provides an intuitive web-based editor, allowing users to easily create professional-looking sequence diagrams quickly and accurately. The application also provides powerful features such as the ability to drag-and-drop objects, edit object properties, and customize the look and feel of the diagram. Additionally, SequenceDiagram.org includes a library of pre-made objects and templates to make diagram creation even easier. Once a diagram is completed, it can be shared in multiple formats, including PDF, SVG, and PNG.
Dia
Lucidchart
PlantUML
SEQO
WebSequenceDiagrams
Discontinued No new versions since 2011. The latest version, 0.97.2, can still be downloaded from the official website.