Facebook Application Blocker is an extension for Google Chrome that allows you to block all the postings on facebook that have been posted by any application.
With this application you can hide all application postings (this is the default setting) or you can choose if you want to see all application postings.
The extension also provides a white list so you can exclude all the applications you like from being blocked by the extension. The small counter at the top of the icon tells you about how many application postings were blocked by the extension.
To add an application to the white list simply click at the "add to white list"-link at the end of the posting.
You can install Facebook Application Blocker from Google Chrome extension gallery