Can you suggest a script-based tool for drawing UML diagrams, similar to http://www.websequencediagrams.com/ , which only help in drawing a sequence diagram.
A complete list of such UML text tools can be found here: http://modeling-languages.com/blog/content/uml-tools-textual-notations-define-uml-models
My top two recommendations right now will be: yUML and PlantUML
If you need something more complex and integrated with Eclipse, try TextUML
Umlet: http://www.umlet.com/, " - ". , .