MuPDF was developed by Artifex Software, who own the copyright.
Along the way various patches for bug fixes and features were
contributed by many outside developers. We are grateful for
these contributions, and while privacy/brevity/confidentiality
prevent us from listing everyone here, we would like to thank
the following in particular:

 * Simon Bnzli (zeniko, of the SumatraPDF project).

 * Krzysztof Kowalczyk (of the SumatraPDF project). 

 * Sebastian Rasmussen (Sebras).