[posixplz]

PlantUML is an excellent tool for creating visual representations of system behaviors. Because diagrams are generated from plaintext, they’re easy to maintain and version control. I use it often when designing new features and systems. You don’t need to pay attention to UML semantics to create valuable diagrams.

[theshrike79]

PlantUML also integrates pretty well with different wikis. The textual representation is saved in the wiki and the image is generated on-demand.

[alexott]

100% - that’s my primary usage of it. It’s easy to encode complex diagram and change it easily.