https://plantuml.com/ is free and nice. Plays well with Markdown and C4 diagrams. The only UML-specific diagram type I use is the sequence diagram but that is very useful IMHO.
https://plantuml.com/ is free and nice. Plays well with Markdown and C4 diagrams. The only UML-specific diagram type I use is the sequence diagram but that is very useful IMHO.