Cost: $US2.99 | Developer: MobFarm srl | Platform: iPhone/ iPod Touch/iPad | Version 2.0.2 | 17.7MB | iOS

From magazines to medical journals, a lot of written media online is distributed in the form of Portable Document (PDF) format files.

Created by software vendor, Adobe, this open standard format has become a popular way for people and companies to disseminate fixed-layout digital documents.

That is why Fast PDF may just become your best friend.

Designed for the iOS, the app organises PDF documents neatly using a virtual bookshelf. Files sit nicely on the shelf with its cover -- or thumbnail of the first page -- facing the user. This makes the files easily identifiable.