Works on both iPads and iPhones, integrates with all the big cloud storage services like Dropbox, Google Drive, iCloud, SkyDrive etc.
This app is currently free for today only, previously it was $9.99 and has been 99c before but has never been free.
App looks quite nice and is also pretty new, having only been released in July this year. Hope you find it useful!
From the app description in iTunes…
Get it FREE only on October 15th! Then $0.99 until Christmas!
• View, open, edit and create MS Word, Excel, PowerPoint and Adobe PDF documents
• Save documents to your cloud storage (iCloud, Google Drive, Dropbox & SkyDrive)
• Share documents via email
• The only Office solution for iOS that supports PDF files
EDIT: Looks like the app has reverted to 99c in the Australian store. However, if you have an account for the US, UK or Canadian iTunes (and probably others) then you can still get it for free.
Great find OP, Thanks !