Some of the people who contributed to KOrganizer:

Original author: Preston Brown <pbrown@kde.org>

Current maintainer: Cornelius Schumacher <schumacher@kde.org>

Additional contributions by:

Fester Zigterman
Ian Dawes
Christopher Beard
Laszlo Boloni

...and many other people, who contributed patches, bug reports, comments,
translations, encouragement and more. Thanks a lot!