Set the transparency level of Cocoa windows
SetAlphaValue is an awesome, free Mac program, that is part of the category Customize your Mac with subcategory Desktop & Menu Bar.
More about SetAlphaValue
Since the software was added to our catalog in 2007, it has achieved 1,749 downloads, and last week it achieved 0 downloads.
SetAlphaValue is a not that heavy program that doesn't need as much space than most programs in the section Customize your Mac.
The program version is 1.7 and its last update happened on 6/13/2007. SetAlphaValue is available for users with the operating system Mac OS X and prior versions, and you can get it only in English.