SumatraPDF is a multi-format (PDF, EPUB, MOBI, CHM, XPS, DjVu) reader for Windows. 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