1. Good Writer is a must-have app for anyone who reads or annotates PDF documents or want to create or edit notes and formal documents in open standard format which can be opened and edited in any standard word processor like Pages, Microsoft Word or Open Office.
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    • FreemiumProprietary
    • Software as a Service (SaaS)
    SharePDF is an easy to embed PDF reader that provides you with detailed reading analytics for PDF documents to help you optimize your documents, whitepapers, brochures, catalogues, e-books etc.
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  2. Edit, Create and Read all PDF files!
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  3. Acrobat.com is a set of online services — file sharing and storage, a PDF converter, an online word processor, and web conferencing — you can use to create and share documents, communicate in real time, and simplify working with others.
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    • FreeProprietary
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Apabi Reader is a powerful eBooks reader,it set of e-book reader, download, collection and other functions in one, both to read but also listen to the book, but also both the RSS reader and a local folder monitoring function.
  4. The DirectOffice Mobile SDK Demo viewer app is a demonstration app that showcases the high fidelity document rendering and conversion of the DirectOffice Mobile SDK library.
  5. PDF Connect Suite is a full-featured PDF document system that transforms your Mac into a powerful PDF Office.
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    • Self-Hosted
    • Software as a Service (SaaS)
    I, Librarian is an online service that will organize your collection of PDF and office files. The service focuses on central management of PDF documents suitable for real-time collaboration in research teams and companies.
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    • FreemiumProprietary
    • iPhone
    • iPad
    • iOS
    Synopsis is a PDF reader + notes + flashcard. FEATURES * A simple Intuitive reader. Highlight and create notes from the Reader. * Automatically create Flashcards from all your highlighted notes. * View your Flashcards in three views.
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  6. The PDF Import Extension for Apache OpenOffice 4.x allows you to import PDF documents into OpenOffice Draw and to modify them.
  7. Looking for a powerful off-road PDF editor with a very light price. You found it! PDF ShapingUp is a comprehensive editor allowing you to create, manage and edit any PDF documents thanks to its many integrated tools.
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  8. View and add comments to Adobe PDF files and fill interactive forms on any Android phone or tablet.

    Discontinued

    The official website and the social pages are no longer available. Last version, 4.0, released in April 2015, can be still bought from the Google Play Store.

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  9. Read Right is a free, lightweight PDF viewer for small portables. Documents are automatically rotated and scaled to fullscreen, so they can be read with the laptop held sideways like a book.
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    • FreeProprietary
    • Android
    • Android Tablet
    PDF Viewing is now available directly in Google Drive. For environments where this cannot be deployed, Google PDF Viewer offers the same capabilities in a standalone app.
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  10. Utilize pdf-notes to manage all the pdf files on your iPhone and iPad. Fast display, quick page-turning even a thousand pages, useful finger-writing and email your notes to your friends.