Code and design: 
Peter 'Roxton' Semiletov <peter.semiletov@gmail.com, www.roxton.kiev.ua>

Additional code: 
Michèle Garoche <michele.garoche@easyconnect.fr>

Other stuff:

I (roxton) took some GPL'ed code (for details see the TEA sources) from Bluefish (0.12), Gsnapshot, LogJam*, Balsa, Antiword, Gaim, Gedit, Anjuta, Leafpad, Glimmer, Screem, Beaver. There are code of: Chris Phelps, Alejandro Dubrovsky, Olivier Sessink, A.J. van Os, Stuart Parmenter, Mauro DePalma, Leandro A. F. Pereira, Mark Spencer, Nathan Walp, Tarot Osuji, David A Knight, Kh. Naba Kumar Singh, Chris Mazuc, Oskar Swida, Alex Roberts, Evan Lawrence, Chema Celorio, Paolo Maggi, Mikael Hermansson, Gustavo Giraldez and others (see the source). Patches for TEA were send from Michele Garoche and Victor Ananjevsky.

* undo.c, undo.h are completely from logjam (http://logjam.danga.com), Copyright (C) 2000-2003 Evan Martin <evan@livejournal.com>
* expr.c, expr.h are from HardInfo (http://hardinfo.berlios.de/wiki/index.php/Main_Page), Copyright (C) 2003-2006 Leandro A. F. Pereira <leandro@linuxmag.com.br>
* grabber.c, grabber.h are from Gsnapshot, (C) 2006 Mauro DePalma <mauro@softcraft.org>
             
##
Translators:
German manual: Hans Faehrmann <hans.faehrmann@freenet.de>
Czech translation: Zbyněk Mrkvička <zbynek@mrkvicka.eu>
French translation: Sylvain Cresto  <scresto@gmail.com>, Michèle Garoche <michele.garoche@easyconnect.fr> 
Latvian translation: Andrejs Meinerts <inni96@inbox.lv>
Spanish translation: Miguel Latorre <kuan@graffiti.net>
German translation: Ruediger Arp <ruediger@gmx.net>
Polish translation: Wit Wiliński <madman@linux.bydg.org>
Serbian translation: Dejan Čabrilo <dcabrilo@gmail.com>
Japanese translation: UTUMI Hirosi <utuhiro78@yahoo.co.jp>
Spanish documentation: Miguel Latorre <kuan@graffiti.net>
Ukrainian translation:  Peter Semiletov Previous ukrainian translators: Vlad Svetlichny, Rudyy 'black fire' Andriy, Oleg Matviychuk, Taras Jahnjuk
Russian translation and documentation: Peter 'Roxton' Semiletov
English documentation (the terrible one): Peter  Semiletov

##
Packages and ports:

Frugalware Linux: Priyank M. Gosalia <priyankmg@gmail.com>
Fink port: Michèle Garoche <michele.garoche@easyconnect.fr>
Crux port: acrux <acrux AT linuxmail DOT org>
Darwin port: Ole Guldberg Jensen <olegb@opendarwin.org>
ALT Linux: Vitaly Lipatov <www.sisyphus.ru/packager/lav> 
Zenwalk: Paul Marwick <paulm@waitrose.com>
Zenwalk (previous maintainers): Jean-Philippe Guillemin, Mike Verret, Fred Broders
Ubuntu: Joao Pinto <joao.pinto@getdeb.net>
prev. Ubuntu packages: Chaigneau Vincent
FreeBSD: Danfe <danfe@FreeBSD.org> 
Slackware: Yanmarshus
Fresh Debian Package: Oisn Mac Fheara
Debian: Lior Kaplan <kaplan@debian.org>, Marco Rodrigues <gothicx@sapo.pt>
SUSE: Detlef Reichelt <detlef@die-mafia.de>
(was - Pascal Bleser)
Arch Linux: Roman Kyrylych 
Mandriva Linux: Lenny Cartier <lenny@mandriva.com>
Mandriva: Steffen Van Roosbroeck <dansmug@mandrakeclub.nl>, MandrivaClub.NL 
Mandrake Linux SRC package: UTUMI Hirosi <utuhiro78@yahoo.co.jp> 
Mandrake Linux: Paul Smith <phhs80@gmail.com>
Fedora: Michael Krylov
Gentoo ebuild: Peter Weller <welp@gentoo.org>
old Gentoo ebuilds: Maciej Szumieluk, Serg, Miguel Latorre <kuan@graffiti.net>
old packages for Slackware: Fred Broders, Anton Ivanov

##
Acknowledgements:

Thanks to (an incomplete and unsorted list):

Zhu Baoshi - who send me "tea"-hieroglyphs from "Fangzheng" fonts.
Michael Shigorin - for the domain http://tea.linux.kiev.ua on osdn.org.ua).
Dmitri Yurchenko <hmd@rootshell.be> - ebuild script to Gentoo.
Detlef Bloch <djbloch@web.de> - the first info about the date/time related bug with configure/make.
Victor Soroka <gbs@tnss.kharkov.ua>  - reported about the compilation bug with Redhat Linux (in TEA 0.9).
Shlomi Loubaton <shlomister@gmail.com> - old Debian package
Aleksey Kirpichnikov <http://coder.paco.net> - good feedback.   
Dmitry Shevchenko 
Dmitry Shurupov (www.nixp.ru)
Oleg Bartunov - some ideas, bugreports.
Segiy Burachek (BUR) <www.composit.iatp.org.ua>.
Dmitri Yurchenko.
Paul Whalley (bug reports and suggestions)
Tom Veidt
Lungu Sergey /keYer/ keyer@bk.ru (Makefile.am patch)
Maciej Szumieluk <mszumieluk@op.pl> (Gentoo ebuild)
Sebastian Schlingmann - fixed a bug related to Spellchecking which causes segfault
Sergey Zhumatiy - fixed a bug in Debian package
Mad Deer
Jose
Alexey Boyko
Miguel Latorre
Hetdegon
Svetlana Semyonova
Dmitriy K
Geert Theys
Meka[ni] - e-build additions
Salvador Koutsomhtsos
Alexey Dokuchaev
Bart Alberti
Peter Müller
Peter Weller
Victor Ananjevsky
Sharon Kimble
Giovanni Giovanzana
Yanmarshus
Oleg Matviychuk
scp
Oleksandr Natalenko
Serkan Calis
Jordan Mantha 
Sam Cater
Yanmarshus
Dmitriy Shilov
Goran Mekić
Dejan Čabrilo
Giovanni Bechis
Bill Gribble

And of course, thanks for the inspiration to Can, Nirvana, Scorn, The Pixies, Frank Black, Bonzo Dog Doo Dah Band, Little Grey Girlfriend, Melt Banana, Tuxedomoon, Grajdanskaya Oborona, Guano Apes, Fall, Juno Reactor, Meathookseed, Broadcast, Napalm Death, NoMeansNo, Bach, Radiohead, Copout, Shaolin Wooden Men, Vladymir Vysotsky, Captain Beefheart and His Magic Band, and demo-groups: Stravaganza, Haujobb, Conspiracy.