Alternatives

Products that do what Franz: Functional Programming Language does

Keyword-free functional language with prototype objects.

1. 1SA
   ScrapScript – A tiny functional language for sharable software▲503

   Hi friends, I started casually working on scrapscript in 2015. I built a few compilers over the years to test out various ideas/implementations, and I think I'm finally happy with the overall design. The code is not public yet. Email me at [email protected] if you're interested in joining the core team later this year. Let me know if you have any questions or feedback :)

   2023 · scrapscript.org

2. 2FA
   Fe – A tiny, embeddable language implemented in ANSI C▲143

   2020 · github.com

3. 3SN
   Skruv – No-dependency, no-build, small JavaScript framework▲123

   2021 · skruv.io

4. 4C6
   C# 6.0 Functional Language Extensions▲164

   2014 · github.com

5. 5BA
   Bolt – A super-fast, statically-typed scripting language written in C▲261

   I've built many interpreters over the years, and Bolt represents my attempt at building the scripting language I always wanted. This is the first public release, 0.1.0! I've felt like most embedded languages have been moving towards safety and typing over years, with things like Python type hints, the explosive popularity of typescript, and even typing in Luau, which powers one of the largest scripted evironments in the world. Bolt attempts to harness this directly in the lagnauge rather than as a preprocessing step, and reap benefits in terms of both safety and performance. I intend to be…

   2025 · github.com

6. 6MM
   Micro-mitten – Research language with compile-time memory management▲236

   I've been working on implementing the compile-time approach to memory management described in this thesis (https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-908.pdf) for some time now - some of the performance results look promising! (Although some less so...) I think it would be great to see this taken further and built into a more complete functional language.

   2020 · github.com

7. 7GI
   Going into freshman year, figured I should build an interpreter▲138

   Hi all! I'm going into my freshman year, and figured that the best way to prepare for the intro to programming Racket course would be to implement my own garbage-collected, dynamically typed, functional programming language in C ;) Anyways... here's the repo: https://github.com/liam-ilan/crumb I started learning C over the summer, so I still have a whole lot to learn... Any feedback would be greatly appreciated! :D

   2023

8. 8AE
   An Easy Programming Language That Runs in the Browser▲138

   2018 · kabas.online

9. 9
   Haskell for Mac▲81

   Functional programming without the hassle.

   2015

10. 10PB
    PlanckForth – Bootstrapping an interpreter from handwritten 1kb binary▲132

    2021 · github.com

11. 11AS
    A small, weird and unpractical programming language▲89

    I've been spending some time coding fp. It is a programming language heavily inspired by the language John Backus described in his 1977 Turing Award lecture. There's plenty of examples in the projects github repository for the interested!

    2022 · github.com

12. 12PL
    Python library for functional programming▲129

    2017 · github.com

13. 13CU
    Compiler using Lisp’s macro system for metaprogramming C-like languages▲80

    2018 · github.com

14. 14HA
    Heresy, a BASIC-inspired functional Lisp▲34

    2014 · github.com

15. 15AP
    A pure functional programming language targeting decentralized systems▲96

    2019 · clio-lang.org

16. 16AP
    A programming language that uses only parentheses▲55

    2012 · github.com

17. 17CA
    Cixl – a minimal, decently typed scripting language▲64

    2018 · github.com

18. 18入R
    入(rù-lang) – Clojurized JavaScript▲51

    2015 · ru-lang.org

19. 19AC
    A compiler for a small language into x86-64 assembly▲74

    2020 · github.com

20. 20KA
    Koi - a programming language that teaches language implementation.▲70

    2010 · thingsaaronmade.com

21. 21LA
    Lingo – A linguistic database in Rust with nanosecond-level performance▲42

    Hi HN, I made Lingo - the SQLite of semantic search. I'm a self-taught developer and researcher who left school at 16, and I've spent some time exploring a first-principles approach to system design for various frontier problems. In this case it's AI that challenges the 'bigger is better' transformer paradigm. Lingo is the first piece of that research, a high-performance linguistic database designed to run on-device. The full technical overview and manifesto is here: https://medium.com/@robm.antunes/bcd1e9752af6 The paper has been archived on Zenodo with a DOI:…

    Sep 2025

22. 22RA
    Runiq, a little Lisp-inspired language that runs on JavaScript▲24

    2015 · github.com

23. 23AA
    Awl, a toy Lisp language written in C and transpiled to JavaScript▲8

    2014 · skepsi.me

24. 24SB
    Sabre – Bullshit-free (c) programming language▲37

    2021 · github.com

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