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Image by Infraware
Polaris Office by Infraware (South Korea)
Price: US$9.99 (iPhone 5 launch discount; normal price US$19.99)
Users can read and edit document files, such as Microsoft Word, Excel, PowerPoint, PDF and so on, on the go.
Image by Penpower Technology
WorldCard Mobile by Penpower Technology (Taiwan)
Users can scan business cards in 16 different languages and sync the contact details to Google Contacts and iCloud. The app also acts as a QR code reader and can link a contact to his or her social network account.