There are a ton of awesome iOS and Mac apps around these days. Many sites cover app news and reviews on a daily basis. If you happen to be in the same boat, you may want to consider displaying attractive screenshot boxes from the App Store to make your posts look more professional. App Store Screens is just the plugin for the job.
This plugin lets you add app boxes to your posts to display screenshots from the app store. You can customize the output using custom CSS rules. The plugin comes with simple shortcodes. This is a commercial plugin.