lang-kotlin-antlr-compiler - Compiler written in Kotlin using ANTLR for Lexing/Parsing and the LLVM for codegen. The language supports Classes, Hindley-Milner Type Inference, and calling native functions. I’m terrible at naming things.
O - Stack-based golfing esoteric language inspired by GolfScript, Pyth, and K. The original interpreter was written in Java, and the current interpreter is written in C. There is also an online playground that has a frontend written in CoffeeScript and a backend written in Python.
These projects are either incomplete or aren’t a full product.
refract - 2D stack-based esoteric language.
GolfCaml - GolfScript interpreter written in OCaml.
fvm - Simple Register VM written in D.
JVMLang - My first compiler with a JVM backend.