1. WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous...

  2. MuPDF is a lightweight PDF and XPS viewer.

  3. Open Source PDF Viewer for Android based on MuPDF library

  4. EBookDroid is an open source (GPL'ed) document viewer for Android based on the VuDroid code...

  5. Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.

  6. A simple and modern eBook viewer.

  7. Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.

  8. Epub editor, convertor and creator software for Mac and PC.

  9. Data Crow is the ultimate media cataloger and media organiser.

  10. A powerful document manager for Mac, Windows, and Linux for managing web content, books, and notes and supports tagging, annotation, highlighting and keeps track of your reading progress.

  11. eReader Prestigio is a multi platform and multi lingual text and audio books reading application for the Android devices.

  12. Librera Reader for Android