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, BMPx, 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

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 documentation (old and removed): (c) 2003-2004 Taras Jahnjuk [jtarasik] <jtarasik@ua.fm, http://anarchi.amillo.net>
Ukrainian translation: Oleg Matviychuk <mathway@i.ua>
Previous ukrainian translators: Vlad Svetlichny, Rudyy 'black fire' Andriy, Peter 'Roxton' Semiletov
Russian localization and documentation: Peterv 'Roxton' Semiletov
English documentation (the terrible one): Peterv 'Roxton' 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>
Mandriva: Steffen Van Roosbroeck <dansmug@mandrakeclub.nl>, MandrivaClub.NL 
ALT Linux: Vitaly Lipatov <www.sisyphus.ru/packager/lav> 
Zenwalk: Mike Verret <Mike.Verret@asrcenergy.com>
Zenwalk (previous maintainer): Jean-Philippe Guillemin <jp.guillemin@free.fr>
Ubuntu: Chaigneau Vincent <vincent.chaigneau@gmail.com>
FreeBSD: Danfe <danfe@FreeBSD.org> 
Slackware: Fred Broders <fredbroders@altern.org> 
Debian: Lior Kaplan <webmaster@guides.co.il>
SUSE: Pascal Bleser <guru@unixtech.be>
Arch Linux: Dejan Čabrilo <dcabrilo@gmail.com>
Mandrake Linux SRC package: UTUMI Hirosi <utuhiro78@yahoo.co.jp> 
Mandrake Linux: Paul Smith <phhs80@gmail.com>
Fedora: Michael Krylov (use ftp://linux:linux@195.248.180.212 for read-only access to his FTP)
Gentoo ebuild: Serg <diverz@gmail.com>
old Gentoo ebuild: Maciej Szumieluk <mszumieluk@op.pl>                 
old Gentoo ebuild:  Miguel Latorre <kuan@graffiti.net>
old packages for Slackware: 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

And of course, thanks for the inspiration to Can, Nirvana, Scorn, The Pixies, Frank Black, Tuxedomoon, Guano Apes, Fall, Juno Reactor, Meathookseed, Broadcast, Napalm Death, Bach, Radiohead, Slipknot, Copout, Vladymir Vysotsky, Stravaganza, Haujobb, Conspiracy.