In game lua executor

I need an in game lua executor and im not sure where to find one? Can you guys give me a forum link or tell me where to download one! Thank you!

No outside download links are allowed, remember.

even if its not an outside link, if someone can give me a thread post from here or make one and send me the link that would be very helpful! I don't know where to get one and ive searched but cant find one!