This is an Emacs major mode for editing KerboScript files. KerboScript is the language used by the popular Kerbal Space Program scripting mod kOS. See the KerboScript and kOS documentation for more information.
At the moment, this is a fairly spartan major mode, but its features include syntax highlighting (including of all global variables and builtin functions I know of, and with customizable font faces), as well as auto-indentation.