Wizardsáand Reports in www-Sharp areáanalogs of plugins in many other programs. However in www-Sharp it is very easy to create new wizard and reports.
Wizards run in modal HTML dialog. It is an HTML page that contains some script. Wizard's window.dialogArguments property is wwwSharp.Applicationáobject, so you can get current project path, URL. Look $(wwwSharp)\Wizards\siteSummary.html (where $(wwwSharp) is directory where www-Sharp is installed) for example.
Reports run in browser window. wwwSharp.Application object is available as window.external object. Unlike wizard report runsáas untrusted html page, Internet explorer can cofirm do you want to execute script.
You can add/remove wizards and reports in Wizards settings page (select View\Property in menu).