Krakenstein is a project mainly written in Lua, it's free.
The Krakenstein Project
To run krakenbake.wlua or healchart.wlua, you'll need:
On Windows, you can get all this and more by installing Lua for Windows.
Outside of Windows, check your local package manager (which will most likely have packages for Lua) and/or Sourceforge (there are some good tips out there for setting up the files you can get from Sourceforge if you search for them).
Read the comments, that's good stuff.