Life & fun · alternatives · 2026

24 alternatives to LambdaLisp – A Lisp interpreter that runs on lambda calculus

A Lisp interpreter written as an untyped lambda calculus term

LambdaLisp is a Lisp interpreter built on lambda calculus foundations. It translates Lisp code into pure lambda calculus expressions, making it useful for anyone interested in functional programming theory or exploring… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. LambdaLisp – A Lisp interpreter that runs on lambda calculus launched in 2022; newer entries below may have overtaken it.

1. 1
   Lambda-8cc – An x86 C compiler written in untyped lambda calculus▲249

   x86 C compiler written in untyped lambda calculus. Contribute to woodrush/lambda-8cc development by creating an account on GitHub.

   2022 · github.com · its alternatives →

2. 2RL
   Risp – Lisp in Rust▲314

   Read Essays by Stepan Parunashvili

   2019 · m.stopa.io · its alternatives →

3. 3PW
   Programming with Pure Lambda Calculus▲61

   Functional programming language based on pure de Bruijn indexed lambda calculus.

   2023 · bruijn.marvinborner.de · its alternatives →

4. 4
   Term-Lisp – A Lisp, based on pattern matching and term rewriting▲83

   A lisp dialect based on pattern matching and term rewriting - abuseofnotation/termlisp

   2024 · github.com · its alternatives →

5. 5SN
   SectorLISP now fits in one sector▲323

   2021 · justine.lol · its alternatives →

6. 6
   A Lisp Interpreter for Shell Scripting▲114

   Redstart is a lightweight Lisp interpreter written in C++ with a focus on shell scripting. It lets you combine the expressive power of Lisp with the practicality of the Unix shell: you can run commands, capture output, pipe between processes, and still use Lisp syntax for logic and structure. Think of it as writing your shell scripts in Lisp instead of Bash.

   2025 · github.com · its alternatives →

7. 7FS
   Full Stack Lisp – A book in progress about writing Common Lisp apps▲338

   2016 · fullstacklisp.com · its alternatives →

8. 8
   Minimal Lisp in ~70 lines of Haskell▲76

   GitHub Gist: instantly share code, notes, and snippets.

   2011 · gist.github.com · its alternatives →

9. 9
   small lisp interpreter in Haskell▲25

   Toy lisp interpreter / PLT playground. Contribute to sanjoy/DietLISP development by creating an account on GitHub.

   2012 · github.com · its alternatives →

10. 10LA
    Lambduck, a Functional Programming Brainfuck▲70

    What if Brainfuck was less like C and more like Scheme? The interpreter implemetation is pretty bad. It's not very fast, it's not very good, and it's probably not very correct. But maybe there's some vaguely interesting programs you could write with it! For example, the Y combinator: λf. (λx. f (x x)) (λx. f (x x)) is written as: \` \`1 `0 0 \`1 `0 0

    2025 · imjakingit.github.io · its alternatives →

11. 11
    A Lisp for code generation and metaprogramming in non-Lisp languages▲7

    Antilisp is a Lisp designed for code generation in non-lisp languages. The interpreter is written in RPython, and the language is designed for easy adoption by non-lispers. The project is still young, but the language can be played with if you don't mind missing some important features like modules and pattern matching. I have not published the source code yet, because I am not completely sure how to base a sustainable business on this project and I don't want to risk having to rugpull after raising expectations.

    2025 · antilisp.com · its alternatives →

12. 12
    A Lispy, embedded Forth▲61

    2017 · github.com · its alternatives →

13. 13
    Lisp in C#▲144

    a custom Lisp. Contribute to codr7/sharpl development by creating an account on GitHub.

    2024 · github.com · its alternatives →

14. 14AL
    A lambda expression visualizer for the web▲43

    2013 · brycec.github.com · its alternatives →

15. 15
    A Lisp interpreter in C# 7▲30

    A Lisp interpreter in C# 7. Contribute to nukata/lisp-in-cs development by creating an account on GitHub.

    2018 · github.com · its alternatives →

16. 16
    Type-level Lambda Calculus interpreter in TypeScript▲10

    Type-Level Lambda Calculus interpreter with TypeScript - desi-ivanov/ts-lambda-calc

    2021 · github.com · its alternatives →

17. 17
    Runiq, a little Lisp-inspired language that runs on JavaScript▲24

    :aquarius: A Lisp-esque, JS-interpreted scripting language - tsortwehttam/runiq

    2015 · github.com · its alternatives →

18. 18AA
    AttaLambda: a language where types and data are made of untyped lambdas▲48

    AttaLambda is a small language built on pure, untyped lambda calculus, with readable syntax, exact rational numbers, and runtime type checks.

    Sep 2026 · attalambda.com · its alternatives →

19. 19
    Rust but Lisp▲218

    Rust but LISP. Contribute to ThatXliner/rust-but-lisp development by creating an account on GitHub.

    May 2026 · github.com · its alternatives →

20. 20
    Caramel – a modern syntax for the lambda calculus▲130

    A modern syntax for the λ-calculus. Contribute to VictorTaelin/Caramel development by creating an account on GitHub.

    2015 · github.com · its alternatives →

21. 21
    A web text-editor where you can write, compute and draw▲218

    2022 · lambdaway.free.fr · its alternatives →

22. 22
    eli – Embedded Lisp Interpreter▲45

    Embedded Lisp Interpreter. Contribute to codr7/eli development by creating an account on GitHub.

    2025 · github.com · its alternatives →

23. 23
    Using Common Lisp from Inside the Browser▲111

    2025 · turtleware.eu · its alternatives →

24. 24ID
    I designed a language for code golf, compiling to Common Lisp▲102

    2013 · rhoscript.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 →