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Lua is distributed in source code here and at several mirror sites. Lua is freely available and can be used for any purpose, including commercial purposes, at absolutely no cost. All released versions are available for download. Check their MD5 checksums and SHA1 checksums to confirm the integrity of the packages.

The current release is Lua 5.1.3, released on 25 Jan 2008. (This is a bug-fix release.) Check out the features of Lua 5.1.

Lua is implemented in pure ANSI C and compiles unmodified in all platforms that have an ANSI C compiler. Lua also compiles cleanly as C++. If you have trouble building Lua, read the FAQ. If you don't have the time or inclination to compile Lua yourself, get a binary or try the live demo.

The lua-users wiki lists many user-contributed addons for Lua, including tools, libraries, full distributions, and binaries for several platforms. LuaForge is the major repository for user-contributed tools, and includes LuaBinaries, a complete repository of pre-compiled Lua libraries and executables.

If you use Lua, please give us credit, according to our license. A nice way to give us further credit is to include a Lua logo and a link to our site in a web page for your product. Please consider adding a description of your product and its use of Lua to our list of projects. Evidence that Lua is being widely used helps to ensure further support for developing Lua at PUC-Rio.

Please consider supporting the Lua project by buying a copy of the reference manual or by making a donation.