Platypus is a powerful developer tool for creating MacOSX application wrappers around scripts.
CocoaDialog is an OS X application that allows the use of common GUI controls such as file selectors, text input, progress bars, yes/no confirmations and more with a command-line application. It requires no knowledge of Cocoa.
A progressbar is somewhat more difficult to create using CocoaDialog and Python than other message boxes. Instead of coding one by myself, I utilized ProgressBar class at e-scribe.com.
