PDFs are the best way to distribute documents on the Net, particularly if you've scanned one. It's much better than sending a generic JPEG scan.

PDF Studio is easy to use, yet powerful enough to allow you a whole host of editing options that enable you to annotate and edit documents. You can use it with existing PDF documents or directly using the tailor made scan-to-PDF feature. Note that PDF Studio doesn't require Adobe Reader to work - it uses its own propriety reader, which isn't nearly as good but does the job.

Editing documents is done via the formatting toolbar across the top. From here you can add text, draw diagrams, add watermarks, stamps and generally deface documents to your heart's content. If you want to join or split some PDFs, you can do that too, and even add a password to open the PDFs you create. Probably the greatest little feature is the ability to add sound and interactive elements to PDF documents - perfect for creating questionnaires and quizzes.

PDF Studio is ideal for anyone who doesn't like working with Adobe Reader and needs to add different types of annotations to their PDFs