iCal4j Extensions is a Java library that provides support for extension (and some non-standard) iCalendar properties and components. This includes support for CalDAV properties, common Calendar User Agents (CUAs) such as Microsoft Outlook, and convenience implementations of components and properties not explicitly defined in the core specifications...
iCal4j Command is a framework that implements common actions and transformations with respect to iCalendar and vCard data. A command line tool is included that allows you to experiment with commands and integrate with your existing processes and workflows...
iCal4j Connector is a tool that helps you manage iCalendar and vCard collections.