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Image by Sam Yu
ExcelContacts by Sam Yu (China)
Users can export iOS Contacts information to Microsoft Excel or Open Office Calc files and edit contact details as well as import the contact list back to their phones.
Image by YUYAO Mobile Software
PDF Reader Pro by YUYAO Mobile Software (Taiwan)
Despite the name of the app, users can read other files such as Word, Excel, Powerpoint and images. Users can take photos of documents to turn them into "scanned" PDF files as well as annotate the files.
Image by Shibuya Masanori
TaskBook :To-Do list organizer by Shibuya Masanori (Japan)
Users can create to-do list, tag the tasks into different categories, and drag and drop different tasks.