Life & fun · alternatives · 2026

24 alternatives to Purely Functional Data Structures

A guide to functional programming

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Purely Functional Data Structures launched in 2016; newer entries below may have overtaken it.

1. 1PL
   Python library for functional programming▲129

   2017 · github.com · its alternatives →

2. 2
   Grokking Algorithms▲77

   An illustrated guide for programmers

   2016 · its alternatives →

3. 3FS
   Full Stack Lisp – A book in progress about writing Common Lisp apps▲338

   2016 · fullstacklisp.com · its alternatives →

4. 4CA
   Caramel – a modern syntax for the lambda calculus▲130

   2015 · github.com · its alternatives →

5. 5AA
   Algorithms and Data Structures Implemented in JavaScript▲34

   2019 · github.com · its alternatives →

6. 6
   The Art of Computer Programming▲91

   "The Bible" of all fundamental algorithms for programming

   2015 · its alternatives →

7. 7CF
   Compiler Fundamentals – Closure Conversion▲70

   2019 · gist.github.com · its alternatives →

8. 8FP
   Functional programming for modern Fortran▲98

   2016 · github.com · its alternatives →

9. 9CD
   Clojure DSL for pattern-matching, parsing and generic programming▲204

   2012 · scattered-thoughts.net · its alternatives →

10. 10CS
    Computer science data structures and algorithms in JavaScript▲9

    2021 · github.com · its alternatives →

11. 11CL
    C library of generic, reference-counted data structures▲91

    2013 · theck01.github.io · its alternatives →

12. 12DD
    Design, data-structure, algorithm problems and their solutions▲103

    2016 · github.com · its alternatives →

13. 13EI
    Easy intro book to Clojure and immutability▲148

    2019 · getprogrammingwithclojure.com · its alternatives →

14. 14DA
    Dslib, an open source library of data structures in JavaScript▲13

    2014 · npmjs.org · its alternatives →

15. 15PA
    PySchemes – A library for validating data structures in Python▲94

    2017 · github.com · its alternatives →

16. 16IA
    Inko – A safe and concurrent object-oriented programming language▲95

    2018 · inko-lang.org · its alternatives →

17. 17FP
    Functional Programming Strategies, the book I'm working on▲5

    Jul 2026 · functionalprogrammingstrategies.com · its alternatives →

18. 18TZ
    The Zen of Data Pipelines (Book)▲27

    2017 · gpestana.gitbooks.io · its alternatives →

19. 19
    The Go Programming Language▲60

    The authoritative resource for learning Go

    2016 · its alternatives →

20. 20MA
    MeTA: A Modern C++ Data Sciences Toolkit▲39

    2014 · meta-toolkit.github.io · its alternatives →

21. 21FP
    Functional programming interactive introduction▲7

    2017 · tech.io · its alternatives →

22. 22
    Programming Pearls▲71

    Clever solutions to classic programming problems

    2015 · its alternatives →

23. 23
    Wolfram Language▲86

    Knowledge-based programming

    2014 · its alternatives →

24. 24
    99 Bottles of OOP▲66

    A practical guide to object oriented design

    2016 · 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 →