claws-mail-vcalendar-plugin 3.9.3-2ubuntu1 (amd64 binary) in ubuntu utopic

 The vCalendar plugin for Claws Mail provides vCalendar message
 handling (the meeting subset of the vCalendar format), displaying such
 mails in a nice format, letting you create and send meetings, and creating
 a virtual folder with the meetings you sent or received.
 The functionality is similar to the provided by Evolution for that mails.