ClockPic is an application that allows users to pick an image from their library and allows an option to edit the image using Filters. This app is not completely done yet. I still have to work on GCD/Blocks to increase responsiveness of the app and there is a bug on filters which I will solve soon. This app uses  UITableView, UITableViewDataSource, UITableViewDelegate, UIImagePickerController/Delegate/DataSourse, UIApplication, NSManagedObjectContext (CoreData to persist the images), UIAlertView/Delegate.