The Google APIs Client Library for Objective-C is a flexible, efficient library provided by Google for accessing its JSON-based APIs. This Library is recommended for applications that will be used on iOS or Mac OS X systems.
Our API directory now includes 54 calendar APIs. The newest is the InfoPark Web Calendar API. The most popular, in terms of mashups, is the Eventful API. We list 47 Eventful mashups. Below you'll find some more stats from the directory, including the entire list of calendar APIs.