Hello, Im would like to write a plugin for the Mail application, but Im not really sure where to start or what programming languages to begin looking at. I would like the plug-in to have a menu item in Preferences and interact with other applications (in this case the Address Book). Since Im working with Ruby, I started looking at RubyCocoa as a possible candidate for the programming language, but not sure of this would be the best choice for this type of job. Could someone with more experience please point me in the right direction? How are most plug-ins coded these days? XCode and Objective-C? Any advice is much appreciated.