There are two sets of overlapping authors: MAUS authors and G4MICE authors. This list is of people who have created branches that have been merged into MAUS (one can see a list of branches here: https://code.launchpad.net/maus).  The list below is the collection of people who are implied when one says "MAUS Developers".

Ryan Bayes <ryan.bayes@glasgow.ac.uk>
Mariyan Bogomilov <Mariyan.Bogomilov@cern.ch>
Timothy Carlisle <t.carlisle1@physics.ox.ac.uk>
Adam Dobbs <adobbs@imperial.ac.uk>
François Drielsma <francois.drielsma.gmail.com>
Simon Fayer <simon.fayer05@imperial.ac.uk>
Jan Greis <j.r.greis@warwick.ac.uk>
Chris Heidt <cheid001@ucr.edu>
Chris Hunt <christopher.hunt08@imperial.ac.uk>
Mike Jackson <michaelj@epcc.ed.ac.uk>
Gene Kafka <gtkafka@gmail.com>
Yordan Karadzhov <yordan@phys.uni-sofia.bg>
Peter Lane <plane1@iit.edu>
John Nugent <j.nugent.1@research.gla.ac.uk>
Celeste Pidcott <c.e.pidcott@warwick.ac.uk>
Durga Rajaram <durga@fnal.gov>
Matt Robinson <m.robinson@sheffield.ac.uk>
Christopher Rogers <chris.rogers@stfc.ac.uk>
Edward Santos <e.santos10@imperial.ac.uk>
Christopher Tunnell <c.tunnell1@physics.ox.ac.uk>
Melissa Uchida <m.a.uchida@imperial.ac.uk>
Antony Wilson <a.wilson1@physics.ox.ac.uk>
Vassil Verguilov <vassil.verguilov@cern.ch>

The list of G4MICE developers is elsewhere.