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.