Release Notes: Major improvements were made to code generation and reverse engineering. Stability was increased. New features for class, use case and activity diagrams were added. New formats for exporting diagrams are now supported. Support for JDK 1.4 was added.
Release Notes: This version is a major overhaul and adds many improvements in all areas. Most importantly, it has a new rendering engine and the saving format now includes UML 2.0 Diagram Interchange information.
Release Notes: This version improves many small details and further improves stability and performance. It has become more responsive, and the loading and importing times have been cut dramatically. The main focus of this release is on stability of loading, saving, and merging projects.
Release Notes: This release is focused on performance and stability, and is very smooth, fast, and stable. Existing features (like navigation, code generation, and roundtrip) have been rounded off, and the new user interface (new look and feel, zoom, bird's eye view) is finished. You can now zoom and pan in the bird view, the most recent diagrams are accessible through tabs, there is a write-ahead feature for selection boxes. Poseidon now saves conforming to XMI 1.2 and UML 1.4.
Release Notes: The focus of this release is stability and usability. The most obvious change is the new front end design. It has new icons, good handling, and well designed navigation. The new zoom and a bird-eye overview also add usability.
Release Notes: Improvements to the sequence diagram, the navigation tree, and printing.