Putting the emphasis on UML is a bit misleading actually (even though it is literally in the name of the tool). I use it for basically any kind of ad hoc diagra

Putting the emphasis on UML is a bit misleading actually (even though it is literally in the name of the tool). I use it for basically any kind of ad hoc diagramming. Essentially, an equivalent of Markdown for PowerPoint charts if that makes sense. A few quick lines in text that look mostly like what they come out as in the diagram and you have a very nice representation of a workflow etc.