Free UML Tool for Fast UML Diagrams
[ О приложении ]

UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and create new, custom UML elements.

NOTE: This is an unofficial package based on the official zip-file releases from www.umlet.com.

Источник
Репозиторий: flathub

FlatPak: UMLet [Developer Tools]