EventStudio System Designer 4.0

EventStudio System Designer 4.0 is a sequence diagram based system design
and object interaction modeling tool for the Windows platform.

* Model complex systems interactions in an easy to learn declarative
modeling language. Model message interactions or object method invocations
using the FDL modeling language (Click here to get a quick overview of
FDL.tutorial pdf).
* Model multiple scenarios of a feature by defining additional scenarios as
differences from a base scenario.
* Generate well formatted sequence diagrams suitable for a formal design
document, a presentation or a poster. Control the layout, color and font in the
sequence diagrams.
* Catch system design errors like resource leaks and invalid timer
operations in success and failure scenarios.
* Modular decomposition of system entities helps in generating high level
with varying level of detail. Generate a module level sequence diagram or a
detailed object interaction diagram from the same model.