Life & fun · alternatives · 2026

24 alternatives to Transactional memory in Forth, in Lisp

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Transactional memory in Forth, in Lisp launched in 2017; newer entries below may have overtaken it.

1. 1
   Kent Dybvig's Scheme Machine in 400 Lines of C (Heap-Memory Model)▲226

   Heap based scheme machine. GitHub Gist: instantly share code, notes, and snippets.

   2025 · gist.github.com · its alternatives →

2. 2AV
   A very simple Lisp interpreter in 250 lines of literate Python▲5

   2017 · khamidou.com · its alternatives →

3. 3
   A Lispy, embedded Forth▲61

   2017 · github.com · its alternatives →

4. 4
   Lisp with copying GC in 537 lines of C (plus Lisp 1.5 on top)▲152

   Moved to Forgejo! Contribute to krig/LISP development by creating an account on GitHub.

   2018 · github.com · its alternatives →

5. 5
   X – A programming language with switchable memory modes▲5

   Jun 2026 · github.com · its alternatives →

6. 6
   Snigl – Forth with a Lisp in C▲6

   2018 · gitlab.com · its alternatives →

7. 7
   Snigl – a Forth with a Lisp in C▲6

   2018 · gitlab.com · its alternatives →

8. 8AA
   Awl, a toy Lisp language written in C and transpiled to JavaScript▲8

   2014 · skepsi.me · its alternatives →

9. 9
   Forth Lisp Python Continuum▲6

   Forth Lisp Python Continuum: A small highly dynamic self-bootstrapping language - asrp/flpc

   2018 · github.com · its alternatives →

10. 10RR
    RDBTools – Redis Memory Analyzer▲9

    2018 · rdbtools.com · its alternatives →

11. 11
    33% Memory Reduction by Reordering Struct Fields▲19

    Learn Go (Golang) by writing real code in this interactive course. Practice structs, interfaces, errors, concurrency, and idiomatic backend patterns.

    2020 · qvault.io · its alternatives →

12. 12IA
    Implementing a Lispy Language in Haskell: Part 1▲6

    Software Engineer in New York specializing in Apple platforms

    2015 · harlanhaskins.com · its alternatives →

13. 13RA
    Recursi – a recursive memory/logic puzzle▲5

    2014 · lkozma.net · its alternatives →

14. 14
    A REPL for practising bitwise operations, written in Rust▲5

    2017 · github.com · its alternatives →

15. 15HB
    Heap-Based Quicksort, Visualized▲7

    2014 · quicksort-heap.herokuapp.com · its alternatives →

16. 16CF
    Conduit for C++: Lazy Sequences Using the Coroutine TS▲7

    2018 · medium.com · its alternatives →

17. 17
    Rust 1.1▲1

    A memory-safe alternative to C/C++ with modern semantics

    2015 · blog.rust-lang.org · its alternatives →

18. 18
    Scar – A programming language for easy concurrency and parallelism▲7

    2025 · scarlang.pages.dev · its alternatives →

19. 19
    Emacs Lisp▲4

    An Introduction

    2017 · amazon.com · its alternatives →

20. 20AN
    A .Net Lisp interpreter with First Class Macros, Continuations▲7

    2012 · patient0.github.com · its alternatives →

21. 21PA
    Plisqin, an SQL generator written in Racket▲7

    2018 · docs.racket-lang.org · its alternatives →

22. 22PA
    Philip2 – an Elm-to-OCaml compiler▲8

    2019 · medium.com · its alternatives →

23. 23FA
    Ferret – A Hard Real-Time Clojure for Lisp Machines▲7

    2016 · nakkaya.com · its alternatives →

24. 24
    We made a back end agnostic SDK for Agent Memory▲5

    May 2026 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →