Engineering:
Pierre Chatelier
mail : pierre@chachatelier.fr
web site : http://pierre.chachatelier.fr/latexit

Human Interface Design:
Pierre Chatelier
Jérôme Cornet
New icon in 1.14.4 version : Mael Hilléreau
New icon in 1.15.0 version : Jacob Bandes-Storch

Documentation:
Pierre Chatelier

Translation:
German translation by Simon Lämmle, Peter Dyballa
Spanish translation (interface) by Álvaro Lozano, Sebastián Ferraro
Japanese translation by Mercury Software Japan Inc., Ryohei Seto
Italian translation by Cristian Zanetti, Ruggero Alberti

With special thanks to:
Ryohei Seto
J. McKenzie Alexander
Charles Jolley
Peter Borg
Troy Stephens, Thomas Schnitzer, David Remahl, Nathan Day and Ben Haller
Jérôme Cornet (my personal interface guru)
Davide Guarisco
Wendy McKay
Objective-Cocoa people, especially Renaud & fouf
http://objective-cocoa.org
and, of course, TeX on MacOS X mailing list people, especially :
Maarten Sneep and Herbert Schulz

Third party components:
Sparkle
Linkback
RegexKitLite
LaTeXMathML