ComputerCraft for Minecraft

This mod adds a game computers, robots, turtles and, most importantly, programming!
On each computer has an operating system CraftOS, file system, a set of built-in programs (including text editor, two games ("adventure" - text version Minecraft and "worm" is a good old snake, and so on). Each computer can be programmed to do what you want on the easy to use actual Lua programming language. More detailed information on programming language Lua you can get on these sites: lua-users.org, lua.ru.