Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

MuPDF is described as 'Highly versatile PDF and XPS solution offering customizable rendering and viewing with features like digital signatures, redactions, and annotations' and is a very popular PDF Reader in the office & productivity category. There are more than 100 alternatives to MuPDF for a variety of platforms, including Windows, Android, Mac, Linux and Android Tablet apps. The best MuPDF alternative is SumatraPDF, which is both free and Open Source. Other great apps like MuPDF are Okular, Foxit PDF Reader, Xournal++ and Evince.
Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

PDF X is a productive PDF reader & editor for Windows. It's powerful for users to view, print, edit, and annotate Adobe Acrobat PDFs.




Apryse, previously known as PDFTron, takes document solutions to the next level, making work better and life simpler.




Comix is an image viewer specifically designed to handle comic books. It reads ZIP, RAR and tar archives (also gzip or bzip2 compressed), as well as plain image files. It has a simple and user-friendly GUI using PyGTK.


Supercharge your paper reading: follow references, skim outline, jump to figures, cite and save.






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


Ashampoo PDF Free is a software for opening, reading, and creating PDF files. It includes a built-in printer driver for generating PDFs from any Windows application, a compact and fast PDF reader, and the ability to fill out interactive and static forms.


AI powered productivity tool for reading, understanding and taking notes on PDFs and long websites. Users can search, summarise, extract and define keywords, ask google-search type questions and be taken straight to the answers.




Xreader is a document viewer capable of displaying multiple and single page document formats like PDF and Postscript.
Offers viewing, searching, printing, and text copying for PDF files on Android. Streamlined for quick access and on-the-go use, optimized for work environments without Drive integration, lightweight, free, and requires minimal permissions.




Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.

