The base of CenterIM was written by Konstantin Klyagin <k@thekonst.net>. It was called CenterICQ.

Currently, the software is written and maintained by several people:
# Stéphane Bisinger
# David Riebenbauer
# Mark Pustjens
# Thomas Graf
# and many more 

See for more information:
http://www.centerim.org/index.php/CenterIM:General_disclaimer
