Lua / Notepad++

To highlight in Lua format that is not actually needed, simply click Language in the menu, go down to L and select Lua and it will highlight the code. I forget which version i got as i have not updated it in a while but it should be built in, you can change to other formats the same way to code with other types etc also.

I don't know what that link is but it seems to be some game thing that uses Lua code also so it's probably to highlight additional things only relating to that so not needed unless you were coding with that i am guessing. Just using the built in notepad++ highlighter has been working fine for me though.

Mac OS X users can download TextWrangler for free from BareBone, which has support for Lua syntax coloring as well.