SumatraPDF is a multi-format (PDF, EPUB, MOBI, FB2, CHM, XPS, DjVu) reader
for Windows under GPLv3 license, with some code under BSD license and the
UnRAR restriction applying.

The main source repository is at http://code.google.com/p/sumatrapdf/

A read-only git mirror is at https://github.com/kjk/sumatrapdf

Want to join the project and contribute code? Read
https://code.google.com/p/sumatrapdf/wiki/JoinTheProject

To compile you need Visual Studio 2008, 2010 or 2012. Open the right solution
from vs directory.