Immutable Ordered Key-Value Database Engine

A statically typed concatenative systems programming language.

A Bestiary of Single-File Implementations of Programming Languages

Portable Forth in C

A simple virtual game console

Small but complete dynamic Forth Interpreter/Compiler for and in WebAssembly

Self-hosting metacompiled Forth, bootstrapping from a few lines of C; targets Linux, Windows, ARM, RISC-V, 68000, PDP-11, asm.js.

Forth inspired programming language for the ESP8266

A server-side web framework written in Forth.

First published Open Source implementation of OpenFirmware

zForth: tiny, embeddable, flexible, compact Forth scripting language for embedded systems

A Forth CPU and System on a Chip, based on the J1, written in VHDL

STM8 eForth - a user friendly Forth for simple µCs with docs

Swapforth is a cross-platform ANS Forth

A not-so-small Forth for Cortex-M

A human readable quasi-concatenative programming language

Modern C64 Forth

An assembler and operating system for the TI-84+ written in Scheme, Forth and Z80 assembly.

libforth: A small Forth interpreter that can be used as a library written in c99

The Kestrel is a family of home-made computers, built as much as possible on open-source technology, and supporting as much as possible the open-source philosophy.