Release Notes: Tool bar has been extended, icons redesigned, loading and saving is much more stable, and release is more reliable in general.
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.