Nock
From Just Solve the File Format Problem
Nock is the "lower-level" programming language that is part of the Urbit project, on which the higher-level Hoon is built. The whole project seems to be attempting to define a totally new computing infrastructure built on a virtual machine, with new languages, protocols, and mysterious terminology. Trying to figure out just what the point of the whole thing is can be difficult.
Nock appears to have a syntax that uses lots of square brackets (like LISP uses parentheses).
