Sequence Diagram Editor simplifies the creation and maintenance of UML sequence diagrams and call flows. It automatically takes care of layout and formatting (across multiple pages if needed) allowing you to easily create sequence diagrams much faster than with drawing programs or even generic UML tools. It supports additional drawing elements like states, actions, timers and scenarios. You can print diagrams directly or export to PDF/RTF.

• Pacestar UML Diagrammer 4.1
  Creates UML diagrams quickly and easily. Develop, document, and communicate your designs in a systematic yet flexible commonly understood notation. Supports activity, class and...

• Blueprint Software Modeler - Community Edition 1.4.0
  Blueprint Software Modeler FREE Community Edition

• Pacestar UML Diagrammer 5.08.1834
  Creates UML 2.0 diagrams quickly and easily. Develop, document, and communicate your designs in a systematic yet flexible commonly understood notation. Supports activity, class and object, use case, sequence, state, package, and component deployment...

• Trace Modeler for UML Sequence Diagrams 1.6
  Trace Modeler is an easy to use and smart editor for UML sequence diagrams

• EventStudio Sequence Diagram Designer 2.5
  Sequence diagrams are a very effective way of modeling an object oriented system. Unfortunately, most UML based modeling tools only offer primitive support for sequence diagrams. EventStudio provides advanced constructs for sequence diagram based object modeling. EventStudio supports generation of message sequence charts (MSCs) and call flow...

• EventStudio Sequence Diagram Designer 2.5
  Sequence diagrams are a very effective way of modeling an object oriented system

• SDE for Visual Studio .NET (ME) for Windows 3.0 Modele
  Visual Paradigm SDE for Visual Studio .NET is a UML CASE tool/plug-in tightly integrated with Visual Studio .NET. This UML software supports full software development lifecycle - analysis, design, implementation, testing and deployment. This UML...

• SDE for Visual Studio .NET (LE) for Windows 3.0 Person
  Visual Paradigm SDE for Visual Studio

• Edraw UML Diagram 5.6
  Edraw is a new UML diagram and software diagram drawing tool