I am looking for an UML modeling tool (e.g. uml designer, papyrus, modelio or such) with a support for collaboration diagrams (as described here : http://www.uml-diagrams.org/collaboration-diagrams/collaboration.html and here http://www.uml-diagrams.org/collaboration-diagrams/collaboration-use.html)
I am especially interested by the ability to draw this kind of schema:
I would also appreciate it if somebody could link me to a good tutorial about this.
PS : To give some context, I am mostly interested in collaboration diagrams in order to describe which part of a class diagram are taking part in a given design pattern (from example which classes of a class diagram are the observer/subject of an observer pattern).