Kyle R. Burton <?>                                                    the first author for gperiodic-1.x.x (1999-2002)
Jonas Frantz <jonas@frantz.fi>                                        the second author for gperiodic-2.x.x (2003-2007)
Alexey Loginov <loginov.alex.valer@gmail.com>                         the third author for gperiodic-3.x.x (2014-2018)

Piotr Najman <?>                                                      patches
Arno W. Peters <a.w.peters@ieee.org>                                  added in gettext support, and other source changes
Georges Khaznadar <?>                                                 related code
Felix Natter <?>                                                      patches
Michael Shigorin <mike@altlinux.org>                                  patches
Costantino Ceoldo <?>                                                 new data and code for the table
Arkadiusz Lipiec <?>                                                  patches
Sebastien Bacher <seb128@debian.org>                                  manual page, patches
Daniel Leidert <daniel.leidert@wgdd.de>                               patches
Theppitak Karoonboonyanan <thep@linux.thai.net>                       patches
Zach Ploskey <zploskey@gmail.com>                                     patches from his fork of gperiodic
Jon Abbott <?>                                                        provided updates to the table
Andrew Dalke <?>                                                      corrected errors in the table
Frederic Gobry <?>                                                    patches
Jan Engelhardt <jengelh@inai.de>                                      patches
Kacper Kowalik <xarthisius@gentoo.org>                                patches

Look at translators in PO files.
