DISCLAIMER: This was a preproject for my programming language. The real deal can be found here.
A custom, minimal Lisp. The name is both derived from the lisping sound and stands for "Highly Interesting Scribbling Subject".
It is not anything yet. But it should compile and run fine.
It uses a slightly modified version of orangeduck's excellent mpc internally for parsing and editline for the REPL mode. Everything else is broken, because I had to write it.