Are you looking to customize your Facebook page so that it stands out? I found this great article from Social Media Examiner which has the top 10 apps you can use to customize your pages and tabs.
In the post, you'll learn about IFrames and how to use them on Facebook. As the article notes, an IFrame is basically taking content from one HTML document and placing it onto another.
There are several great apps to choose from so if you're looking to brand your page, check out: Top 10 Facebook Apps for Building Custom Pages and Tabs