Variable Response Expression-Controller, or VREC is a promising programming language. Here is a simple "hello world":

"id" => output.p = "hello world";

VREC has many more features such as variables and ifs. I am also working on an input feature and a something to change the text of an output. Check out the documentation for more (press "download now" on the VREC page). 

How would you like to be a part of this amazing project? Learn more here.