Updated October 2010
A paper on case studies with Plural was published at ECOOP 2009 in Genova. For this paper I annotated a number of Java standard library APIs with Plural-readable annotations. In the interest scientific transparancy, I am making the annotated Java API files available here.
For license-technical reasons, I currently cannot make the open-source programs I checked against these APIs available publicly; please contact me if you would like to look at these files.