awesome-forth-implementations

A list of forth implementations I find and think are interesting in some way. This list is curated to my very subjective tastes for now but feel free to submit PRs.

Here I will provide github links which are maybe easier to navigate.

factor: a concatenative, stack-based programming language with high-level features including dynamic types, extensible syntax, macros, and garbage collection.
gforth (mirror): Gforth is a fast and portable implementation of the ANS Forth/Forth 200x language (original on savannah)
colorForth: A dialect of Forth that uses color to replace punctuation. Includes its own operating system. Produces extremely compact programs. Instant compile from pre-parsed source. Source forge
r34d: Similar to colorForth but with prefixes instead of colors.
rainbowforth: An implementation of colorforth.
firmforth: A JIT forth that uses libfirm, a library for optimization, to gain some speed.
neos: a cross-platform language agnostic scripting engine with a custom bytecode JIT.
bigforth: bigFORTH is a fast x86 implementation of the ANS Forth language
if.x86: A hybrid stack plus register based programming language.
b1fipl: Some short implementations of forths can be found here
XY: a family of array-oriented, concatenative programming languages with first-class continuations. XY 1 has quotations, lists, functions, and patterns. XY 2 is flat. XY 0 has quotations and shuffle-symbols but dispenses with lists and patterns. (I don't know where to find an implementation only a document)
Kitten: a statically typed, stack-based functional programming language designed for simplicity, speed, and safety.
Stabel (alpha): RPN + static type system, compiles to WebAssembly. Not a forth per se, but may offer some ideas or be of some use.

Resources

While this repo is not intended to be focused on resources I provide some here:

cheat sheet
Forth documents: A repo with forth-related documents.
forth-mode: emacs mode for forth (haven't tried it)
forthwin user group
concatenative programming wiki: comprehensive index of concatenative language implementations with plenty of links/references
ultratechnology: a compilation of stories, historical implementations, essays/perspectives, etc.
Forth compilers page A (historical) list of forth implementations.
Brad Rodriguez Excellent forth resource, most notably the "Moving Forth" article series
Albert van der Horst Another personal site with lots of forth-related information, such as forth lectures.

Books

Starting Forth
Thinking Forth
Programming a problem-oriented language
Threaded Interpretive Languages: Their Design and Implementation by R.G. Loeliger

Cheatsheet

fakedrake/awesome-forth-implementations

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