Custom Add-on / Plugins for the Titanium Platform written in Obj-C (iOS), Java (Android) or Javascript. Functions and features not included in the standard Titanium API.
Titanium is a JavaScript based platform for developing mobile applications produced by Appcelerator.
It supports Android, iOS (iPhone, iPod, iPad), Blackberry and Mobile Web applications using a mostly common set of Mobile APIs which render using each platform's native controls and features.
Titanium modules allow developers with experience in specific native platforms to leverage that experience in the form of Add-On's or plugins. Generally modules encapsulate native API's not found in the Titanium SDK (such as EventKit for iOS), wrap some outside service (UrbanAirship libraries) or access hardware specific features (such as OpenGLES modules).