Original vixie-cron was written by Paul Vixie.

Significant contributors:
Marcela Mašláňová <mmaslano@redhat.com>
Colin Dean <colin@colin-dean.org>
Tomáš Mráz <tmraz@fedoraproject.org>
Marco Migliori <sgerwk@aol.com>
Sami Kerola <kerolasa@iki.fi>