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Poseidon for UML is a fully-fledged UML CASE tool. It evolved from the Open Source project ArgoUML and turns it to a world class modeling tool. With over 200.000 installations it belongs to the industries most important tools. The strong focus on usability makes it the easiest tool to learn and work with. It is delivered in different editions to meet different needs of different users.


Mac OS X 10.2 or later, JDK 1.3.1 or later

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Anonymous Member IconReview

Although an OS X installer is provided, the actual support for OS X is poor. By default it runs in JDK 1.3, and only by manually editing the Info.plist file can you change this. Unfortunately, while the 1.x series of Poseidon would then run reasonably well (if slowly) under JDK 1.4, the 2.x series (up to 2.1.1) does not. A wide range of functionality is broken, including such simple things as opening a file. (Apparently Poseidon manages to use OS and JDK version-specific code for this function.)

If you have used Poseidon elsewhere and like it, and would like to use it on OS X, please write to the company and urge them to make OS X support a priority. As it is now, the same bugs have sat around for about a year since the move to 2.0 with no effort put towards resolving them whatsover. Their documentation doesn't even answer questions about OS X -- they point you to the user forums instead. Some commercial product!

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Version 2.1
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Current Version (3.x)


Downloads 5,641
Version Downloads 2,667
License Demo
Date 25 May 2005
Platform OS X / PPC 32
Price Free
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