How can I open a folder called something.app in various applications? For whatever reason, I created a folder on my Mac called customer.app, and it contains a python module.  I want to open that folder and it's files in applications like BBEdit and GitX, but the open dialog shows this folder as greyed out and won't let me select them.

Are there any settings or properties I can set on this folder to tell my Mac that it is just a regular old folder?
UPDATE: Recent versions of OS X have removed this ability. The answer below applies to OS X 10.9 or earlier.

A simple right-click of the folder will enable you to view the contents using "Show Package Contents."

If you're trying to access the folder from a Save/Open dialog, then try changing your view type from icons to Column mode.