Original code:

  Timo Sirainen <cras@irssi.org>

Irssi staff (current maintainers) <staff@irssi.org>:

  Valentin Batz (senneth, vb)
  Wouter Coekaerts (coekie)
  Jochen Eisinger (c0ffee)
  Geert Hauwaerts
  Emanuele Giaquinta (exg)
  Jilles Tjoelker

Large feature patches by:

  David Leadbeater (dg, dgl) : isupport
  vjt@users.sf.net : SSL support
  Joel Eriksson : SSL certs
  Heikki Orsila : DCC SEND queueing
  Mark Trumbull : DCC SERVER
  Francesco Fracassi : Passive DCC

Other patches (grep for "patch" in ChangeLog) by:

  Toby Peterson
  Soren Jacobsen
  Kuang-che Wu
  Joost Vunderink (Garion)
  Wang WenRui
  Jean-Yves Lefort (decadix)
  Joel Eriksson
  Maarten van der Zwaart
  Noah Levitt
  Krzysztof Kowalik (Borys)
  Peder Stray
  mls@suse.de
  nix@suhs.nu
  Marcin Kowalczyk (Qrczak)
  Petr Baudis
  Bjoern Krombholz (fuchs)
  aldem-irssi@aldem.net,
  BC-bd
  Juerd
  Han
  pv2b
  Tommi Komulainen (tommik)
  mike@po.cs.msu.su
  zinx@magenet.net
  yathen@web.de
  paul@raade.org
  Leszek Matok
  tygrys@moo.pl
  manoj@io.com
  cph@cph.demon.co.uk
  ganesh@earth.li
  Jakub Jankowski (shasta)
  vanilla@freebsd.org
  Tinuk
  Mark Glines
  Kjetil Ødegaard
  Chris Moore
  ComradeP
  Lauri Nurmi
  Mikko Rauhala
  loafier
  Nicolas Collignon
  Daniel Koning
  Yi-Hsuan Hsin
