1. Forth CpuA Forth CPU and System on a Chip, based on the J1, written in VHDL
2. Stm8efSTM8 eForth: a user-friendly Forth for cheap µCs with docs
4. Common 3d Test ModelsRepository containing common 3D test models in original format with original source if known and obj mesh
5. ZforthzForth: tiny, embeddable, flexible, compact Forth scripting language for embedded systems
7. Zkeme80An assembler and operating system for the TI-84+ written in Scheme, Forth and Z80 assembly.
8. FlpcForth Lisp Python Continuum: A small highly dynamic self-bootstrapping language
9. WaforthA bootstrapping dynamic Forth Interpreter/Compiler for WebAssembly
10. KestrelThe 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.
11. OpenbiosFirst published Open Source implementation of OpenFirmware
13. Libforthlibforth: A small Forth interpreter that can be used as a library written in c99
15. GforthGforth mirror on GitHub (original is on Savannah)
17. R4:r4 concatenative programming language with ideas from ColorForth.
19. MuforthA simple, indirect-threaded Forth, written in C; for target compiling; runs on Linux, BSD, OSX, and Cygwin
20. Stif IndonesiaImplementation of "Semi-Supervised Low-Resource Style Transfer of Indonesian Informal to Formal Language with Iterative Forward-Translation".
21. SynstackModular soft synth & Forth based VM for audio DSL experiments
24. FifStack-based Programming in Clojure(script)
26. J1scA reimplementation of a tiny stack CPU
30. Myforth ArduinoA simple, non-standard, tethered Forth for the Arduino; including several steno keyboard applications, the most recent of which is stenomod16. The same firmware was used by the original TinyMod, but has been replaced with C code in order to use USB HID.
32. KittenA statically typed concatenative systems programming language.
35. B1fiplA Bestiary of Single-File Implementations of Programming Languages
43. 1991A server-side web framework written in Forth.
44. LbforthSelf-hosting metacompiled Forth, bootstrapping from a few lines of C; targets Linux, Windows, ARM, RISC-V, 68000, PDP-11, asm.js.
45. OpennmtOpen Source Neural Machine Translation in Torch (deprecated)
46. FstarA Proof-oriented Programming Language
47. Ar.jsEfficient Augmented Reality for the Web - 60fps on mobile!
48. retro-40A Fantasy Computer using Forth as its system language
50. cc64cc64 is a small-C compiler written in Forth, hosted on the Commodore C64, Plus4 and C16 with 64k, and on the Commander X16. It is targeting the 6502 CPU.