There’s no doubt that QuickLook is one of the best things about Mac OS X: it provides easy and quick previews for any kind of file. However, QuickLook has a few major drawbacks: if you switch to another application the QuickLook window hides. Even with Exposè, you can’t retrieve the preview you opened. And, you can’t use more than one QuickLook.
Yesterday I stumbled upon this new app, DropLook ,which seems very interesting.