Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Clause: an expressive JavaScript contract system, inspired by clojure.spec launched in 2017; newer entries below may have overtaken it.

1. 1CO
   Coast on Clojure: A full stack framework with a catchy name▲8

   2017 · medium.com · its alternatives →

2. 2
   Eloquent Javascript▲20

   A modern introduction to Javascript

   2014 · eloquentjavascript.net · its alternatives →

3. 3
   NotebookJS▲109

   Scientific computation for JavaScript

   2016 · datazar.com · its alternatives →

4. 4LA
   Lightmod, an all-in-one tool for full stack Clojure▲7

   2017 · sekao.net · its alternatives →

5. 5AR
   An REPL oriented testing framework for Clojure(script)▲7

   2021 · fctorial.github.io · its alternatives →

6. 6
   Adas.ana – clojure productivity macros, a novel take on anaphoras▲5

   2018 · github.com · its alternatives →

7. 7AA
   Awl, a toy Lisp language written in C and transpiled to JavaScript▲8

   2014 · skepsi.me · its alternatives →

8. 8OP
   Object Playground - The definitive guide to object-oriented JavaScript▲5

   2013 · objectplayground.com · its alternatives →

9. 9PM
   Practical Modern JavaScript▲7

   2017 · ponyfoo.com · its alternatives →

10. 10AT
    A tool for making live-moddable games in Clojure▲6

    2014 · nightmod.net · its alternatives →

11. 11FA
    Ferret – A Hard Real-Time Clojure for Lisp Machines▲7

    2016 · nakkaya.com · its alternatives →

12. 12CA
    Crsh – A JavaScript based command line shell▲9

    2020 · crwi.uk · its alternatives →

13. 13IC
    Interactive Course on JavaScript Closures▲7

    2021 · slip.so · its alternatives →

14. 14
    Lambda Lessons▲6

    Pattern-matching, first-class functions, and more in Haskell

    2014 · stevekrouse.github.io · its alternatives →

15. 15
    Nullstack – A framework for full stack JavaScript components▲7

    2023 · nullstack.app · its alternatives →

16. 16JM
    Jindo – minimalist reactive backend for JavaScript applications▲7

    2016 · jindo.io · its alternatives →

17. 17
    Nirvana, a WIP programming language▲8

    2018 · github.com · its alternatives →

18. 18
    JsonTree, a tool for turning JSON data into a collapsible html tree▲9

    A lightweight vanilla Javascript micro-library for making collapsible trees with JSON - MaxLeiter/jsonTree

    2016 · github.com · its alternatives →

19. 19IJ
    Interactive JavaScript tutorial on closures and continuations▲6

    2011 · nathansjslessons.appspot.com · its alternatives →

20. 20
    Curveball, a microframework in TypeScript with AWS Lambda support▲7

    2020 · evertpot.com · its alternatives →

21. 21
    StudioLedger – Escrow-protected contracts for creators, on XRPL▲8

    Apr 2026 · github.com · its alternatives →

22. 22AS
    A smart Django/Node code generator written in Haskell▲7

    2021 · app.imagine.ai · its alternatives →

23. 23TC
    The CLI Book – Writing Successful Command Line Clients with Node.js▲7

    2016 · theclibook.com · its alternatives →

24. 24JA
    jq, a lightweight commandline JSON processor▲5

    2012 · stedolan.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 →