Many people helped.

People who contributed to the project in one way or another, in alphabetical order:

André Carregal of the Kepler Project - all sorts of advice

Bruno Guedes of Fabrica Digital - help with the stylesheet.

Dado Sutter of PUC-Rio and Plurall - Portuguese translation of the interface

ferrix - many bug fixes and new features.

Hisham Muhammad of LuaRocks - packaging work for Kepler, FastLCS library

Jérôme Vuarand - templates for the LuaUsers demo

Jim Whitehead - SQL backend for Versium and too many other changes to list here.

Maurício Bomfim of Fabrica Digital - early testing and debugging (the official First User).

Pierre Pracht - ideas for Versium/Saci and help in moving to git.

Sérgio Medeiros of LabLUA - LuaPOD and LuaSVN

Yuri Takhteyev - project leader, see Sputnik's background story.

Sputnik also uses a number of ready Lua modules and frameworks:

WSAPI by Fábio Mascarenhas and André Carregal

LuaRocks by Hisham Muhammad

Markdown by Niklas Frykholm

LuaFileSystem and MD5 by the Kepler Project

LuaLogging by Thiago Ponte, Danilo Tuler and André Carregal

LuaDoc by Tomás Guisasola Gorham

lbase64 by Luiz Henrique de Figueiredo

luasocket by Diego Nehab

And a few components that have nothing to do with Lua:

Silk Icons by Mark James (in Earth) Crystal Clear Icons by Everaldo Coelho (since Fenchurch) JQuery JavaScript library

SortTable by Stuart Langridge

reCaptcha

YUI CSS Framework by Yahoo!

Some packages that are not used at the moment but which were useful at some point:

LCS module from stdlib by Reuben Thomas