Sumatra PDF
Software
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Sumatra PDF is a free and open-source document viewer that supports many document formats including: Portable Document Format, Microsoft Compiled HTML Help, DjVu, EPUB, FictionBook, MOBI, PRC, Open XML Paper Specification, and Comic Book Archive... Wikipedia
Developer(s): Krzysztof Kowalczyk, Simon Bünzli and others
License: GNU General Public License v3
Operating system: Windows Vista and later
Repository: github.com/sumatrapdfreader/sumatrapdf
Size: 4.63 MB (32-bit), 4.96 MB (64-bit)