1. 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.

  2. FBReader is an e-book reader for various platforms. Features:

  3. Academia is a website where you can share papers that are written with other users. You can use a Google or Facebook account to sign in to the website.

  4. zathura is a highly customizable and functional PDF viewer based on the poppler rendering library...

  5. Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...

  6. With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.

  7. Utopia Documents, a next-generation scientific article reader

  8. Paperity is the first multidisciplinary aggregator of Open Access journals and papers.

  9. Innovative book reader with powerful controls & full functions

  10. Program for organizing and commenting textual citations from texts (books, articles, or other...

  11. ChmFox is a ...

  12. Biblioscape is a bibliography software to generate citations and a bibliography in APA, MLA, etc.