Ever wanted to use Piwik on your GWT enabled sites? This library implements a java class for GWT allowing you to use Piwik functionality such a recording page hits, outbound link clicks and goals.
Piwik piwik = new PiwikImpl(<piwikId>,<url to Piwik.php>);
Have not thoroughly tested all functions but the basics should be working fine. If not, do let me know.