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. A small symbolic math command line using algebrite and katex launched in 2018; newer entries below may have overtaken it.

1. 1
   KnightOS▲136

   An open-source OS for calculators

   2016 · its alternatives →

2. 2
   I made an interactive hex calculator in ncurses▲113

   Terminal based bit manipulator in ncurses. Contribute to mellowcandle/bitwise development by creating an account on GitHub.

   2019 · github.com · its alternatives →

3. 3OS
   Open-source SIMD-accelerated math library for C/C++/C#/Java/FORTRAN▲9

   2013 · yeppp.info · its alternatives →

4. 4
   An Elementary Introduction to the Wolfram Language▲60

   Stephen Wolfram's new book on the Wolfram Language

   2015 · wolfram.com · its alternatives →

5. 5
   A Golang library to build Turing machine▲6

   2019 · made2591.github.io · its alternatives →

6. 6AA
   Awl, a toy Lisp language written in C and transpiled to JavaScript▲8

   2014 · skepsi.me · its alternatives →

7. 7
   Xenops: LaTeX editing with automatic asynchronous rendering in Emacs▲5

   An editing environment for LaTeX mathematical documents - dandavison/xenops

   2020 · github.com · its alternatives →

8. 8RE
   Redesigned: Escherpad, a collaborative math and code notebook▲6

   2015 · escherpad.com · its alternatives →

9. 9
   Mathpix▲12

   OCR for solving hand-written math equations

   2016 · mathpix.com · its alternatives →

10. 10
    High-performance mathematical paradigms in Python▲7

    Improve the execution speed of pythonic paradigms.

    2018 · medium.com · its alternatives →

11. 11PA
    Philip2 – an Elm-to-OCaml compiler▲8

    2019 · medium.com · its alternatives →

12. 12
    The Julia Language▲10

    A high-level, high-performance dynamic programming language

    2017 · julialang.org · its alternatives →

13. 13
    A REPL for practising bitwise operations, written in Rust▲5

    2017 · github.com · its alternatives →

14. 14AV
    A very simple Lisp interpreter in 250 lines of literate Python▲5

    2017 · khamidou.com · its alternatives →

15. 15IA
    Idio, a Programmable Shell▲6

    2021 · idio-lang.org · its alternatives →

16. 16
    Prototype of a pair programming tool without special editors▲5

    2021 · github.com · its alternatives →

17. 17TA
    Ten – A Tiny Scripting Language▲8

    2019 · ten-lang.io · its alternatives →

18. 18AO
    An Online Unix Simulator▲8

    2015 · uberty.co · its alternatives →

19. 19AC
    A collection of tiny web tools and calculators▲5

    2022 · thetinytools.com · its alternatives →

20. 20NT
    NumPy to C++14: the xtensor cheat sheet▲6

    2017 · xtensor.readthedocs.io · its alternatives →

21. 21HS
    Halcyon – System for installing Haskell apps▲6

    2015 · halcyon.sh · its alternatives →

22. 22AT
    A tool to visualize exponential sums▲8

    2019 · anvaka.github.io · its alternatives →

23. 23
    A fast command-line tool for solving Queens puzzles▲5

    I've been hooked on Queens puzzles (https://www.linkedin.com/games/queens/) for the last few months, and decided to try and build a solver for them. Rather than doing a traditional solution search, I tried to model it instead on how humans solve these puzzles, iteratively eliminating and confirming possible squares for Queens. And since this was a side-project, I decided to go overboard, and try and make it as fast as possible (avoiding HashMap/HashSet in favor of bit fields, for example).

    2025 · github.com · its alternatives →

24. 24FA
    Ferret – A Hard Real-Time Clojure for Lisp Machines▲7

    2016 · nakkaya.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 →