LuaPill

LuaPill (short for "Practical Isometric Layering Library for Lua") is an engine for generating isometric maps for Löve2D and Lua.

function love.load()
   map = require "luapill"
   local config = {
      tilewidth = 128,
      tileheight = 64,
      folder = "images"
   }
   map:setup(config)
end

function love.update(dt)
end

function love.draw()
   map:draw()
end

config = {
      tilewidth = number, -- required
      tilewidth = number, -- required
      folder = "path", -- required
      sortFolder = boolean, -- optional, default false
      defaultTile = number, -- optional, default 1
      tileIndex = number -- optional, default 1
   }

Grab it and give it a spin on [1]. There is even a full working demo there.

Enjoy!