Sequence Diagram

We are using UML to communicate designs and sometime you'll want to have it drawn out nicely (yes, i do need to work on my penmanship.) and i stumbled upon http://www.websequencediagrams.com/. It's a really useful web site that we can just write all the interaction and it will generate a nice sequence diagram. It has all kinds of plugin, confluence, eclipse, intellij, maven so you can use it in your favorite editor. Then I came across PlantUML, http://plantuml.sourceforge.net/, which the syntax for the sequence diagram is highly deived from websequencediagram.com but it supports a whole lot more!