Astah UML vs BOUML

Astah UML has no write-up on Specifiction yet; its figures are above.

BOUML is a free UML 2 toolbox for modeling systems and generating code, available as desktop software for Linux, macOS, and Windows. It supports use case, sequence, communication, class, composite class, activity, state, object, composite object, component, and deployment diagrams. Built-in generators cover C++, C, Java, PHP, Python, IDL, and MySQL; reverse-engineering tools are listed for C++, Java, PHP, and MySQL, and round-trip tools for C++, Java, and PHP. Plug-outs provide XMI 1.2 and 2.1 generation, XMI 2.1 import, and Rational Rose model import. External plug-outs can be written in C++ or Java and run separately from BOUML. An HTML documentation generator can output diagrams as PNG or SVG. Project control and synchronization tools support work by several people. The maker says it can handle several thousand classes while using little memory. Version 7.11 is identified as the final release, with patch 4 listed for some distributions. Releases since version 7.0 are free to use; the maker states they come without warranty.