Edit your PDF files quickly and intuitively. Open, edit, save or convert PDF files with PDFTool – it’s up to you.



STDU Viewer is described as 'Are you tired from many viewers one for each document? Do you want to have, one program for all your technical documentations, scientific books and so on? Do you want to have program, which fast opens files, fast loads pages and fast renders page to screen? And all of this in fre' and is a popular PDF Reader in the news & books category. There are more than 50 alternatives to STDU Viewer for a variety of platforms, including Windows, Linux, Android, Mac and Android Tablet apps. The best STDU Viewer alternative is SumatraPDF, which is both free and Open Source. Other great apps like STDU Viewer are Okular, Foxit PDF Reader, Evince and MuPDF.
Edit your PDF files quickly and intuitively. Open, edit, save or convert PDF files with PDFTool – it’s up to you.



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.


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.


The simplest PDF viewer. Safe (doesn't require permissions), lightweight (just 6,9MB) and modern.

DjVuLibre is an open source (GPL'ed) implementation of DjVu, including viewers, browser plugins, decoders, simple encoders, and utilities.


A simple PDF document viewer, in the lines of Evince but without using the Gnome libraries. ePDFView is a free lightweight PDF document viewer using Poppler and GTK+ libraries.

Xreader is a document viewer capable of displaying multiple and single page document formats like PDF and Postscript.

PDF Max is a desktop class PDF app for reading, annotating or signing PDF documents on your iPhone/iPad. Mark up documents with highlights and handwriting, insert texts and stamps, fill out, sign PDFs and even manipulate PDF pages.




Cloud-based PDF viewer and annotation tool for your browser. Perfect for Chromebook 1:1 schools. View, export, print and share your PDF files straight from your browser. Kami works on all browsers and works best with Google Chrome.
The Flipping PDF Reader allows to read PDF documents in user friendly interface with flipping book effect. Good looking and convenient alternative for Adobe PDF Reader.

AVS Document Converter is an easy-to-use software application designed to view and convert various types of documents. AVS Document Converter can quickly and easily perform the following tasks:

