Soonr Scribble lets you annotate and share documents in more than 35 file formats, including PDF and Microsoft Office Word (.doc), PowerPoint (.ppt), and Excel (.xls). This free app saves your notes, proposals, expense reports, and other mobile files to the Soonr cloud service. The S Pen makes it easy to highlight text, write comments in margins, and insert arrows where necessary. Another cool feature is Soonr's rendering technology that lets you view more than 40 different file types without having to download the document. Soonr supports more than 800 mobile devices running iOS, Android, and BlackBerry OS.