wxCocoaDialog is a multi-platform port of the CocoaDialog application for OS X, 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 is ideal for use in shell and Perl scripts (or Ruby, or Python, or... etc).

The wxWidgets port was originally created for use in the e text editor, which supports TextMate bundles and can be extended with shell scripts (through cygwin). Since it could be useful in a lot of other contexts than e, it was released to the community as open source.