VOTE: plantuml. Thanks !
The easiest way to test PlantUML is in an online solution that has PlantUML embedded, such as our online server.
After testing, you may want to install PlantUML locally.
You need these things to run PlantUML:
Use PlantUML's command line syntax to include it in your own scripts or documentation tools:
@startuml Alice -> Bob: test @enduml
sequenceDiagram.txtas input. The output is an image, which either appears in the other software, or is written to an image file on disk.
java -jar plantuml.jar sequenceDiagram.txt