Orion Viewer is not available for Windows but there are some alternatives that runs on Windows with similar functionality. The best open source Windows alternative is MuPDF. If that doesn't suit you, our users have ranked more than 25 alternatives to Orion Viewer and seven of them are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Orion Viewer are WinDjView, C.B.R. - Comic Book Reader, Xpdf and NightPDF.
MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.
WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options. It uses the free DjVuLibre library to decode DjVu documents. DjVu is a web-centric format and software platform for distributing documents...
Comic Book Reader is the viewer you need to enjoy all your electronic publication. It is available both as Desktop and Windows 8 Metro UI for PC and tablets.
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.
modern computer flatboat is a mobile pdf viewer written in Qt and using MuPDF's libfitz.
United States
Russia
Spain
EU