Official Website: http://www.lua.org/What is Lua?
Lua is a powerful, fast, lightweight, embeddable scripting language.
Lua combines simple procedural syntax with powerful data description constructs based on associative arrays and extensible semantics. Lua is dynamically typed, runs by interpreting bytecode for a register-based virtual machine, and has automatic memory management with incremental garbage collection, making it ideal for configuration, scripting, and rapid prototyping.
Since Lua v5.2.3 nor srlua for v5.2.3 has no official build (?)
I have made a build for both x86 and x64 : http://joedf.users.sourceforge.net/luabuilds/