The bundle provides:
– General lua language functionality (package luaextra) provided by the LuaTeX team (and imported, here, from the ConTeXt distribution);
– The means (package luamcallbacks) to register functions in LuaTeX callbacks, providing macros and a lua source file; and
– General extensions (package luatextra), incorporating an extended version of the e-TeX register extensions package, support for lua attributes, and provision of a module system, modelled on the LaTeX package management functions.

The author is Élie Roux. The package is Copyright © 2009 Elie Roux.