: Part of the KDE desktop suite, this is a solid, no-nonsense UML modulator that handles multiple diagram types well. Draw.io (diagrams.net)
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: StarUML is primarily open-source. This means that you can download, use, and even modify the software freely. The open-source nature usually implies that there's no need for a license key for basic usage. : Part of the KDE desktop suite, this
If your heart is set on StarUML itself, there are legitimate ways to use it without resorting to cracks. this is a solid