The Queen Mum of Weblog Hosting Systems – written in server-side JavaScript since 2001.

Helma web framework

An interpreter for the Piet programming language

Visual Studio Code extension providing support for syntax coloring of Helma skins etc.

an interpreter for the programming language piet written in haskell

Funge-98 interpreter and debugger written in Haskell

An implementation of the Malbolge interpreter in Rust.

Standard Interpreter for Malbolge, ported from Ben Olstead's original C interpreter.

Haskell Unlambda Interpreter

Curated list of awesome Esoteric languages and resources

Albus is a Whitespace interpreter written in Rust.

A simple Whitespace VM written in Rust

CS 345H Final Project to implement the Piet programming language in Scala

Brainfuck JIT/Compiler made with Idris

A simple Malbolge interpreter

A Befunge interpreter written in Rust

Bytecode-compiling Unlambda 2.0 interpreter

Whitespace interpreter