Search notes:

UML tools

UMLGraph

Installing

Execute ant compile (not ant build.xml, otherwise it will say Target "build..xml" does not exist in the project "umlgraph".
Create a drawing with ./umlgraph.

Plantuml

http://plantuml.com/
java -jar plantuml.jar description-file.txt

Ditaa - Diagrams through Ascii Art

http://ditaa.sourceforge.net/

Index