CJam

CJam is a stack-based programming language inspired by GolfScript. It was created by aditsu in 2014. The official interpreter is written in Java.

Instructions
Consult the CJam cheat sheet (PDF) by User:Lynn.

Hello, world!
"Hello, world!"

Cat program
q

Truth-machine
ri{_p}h;

Turing-completeness
CJam is Turing-complete. To show this, writing a Brainfuck interpreter wouldn't be too hard. A lazier proof is to say that the Underload commands  correspond to the CJam commands.

External resources

 * CJam homepage