Dev tools · alternatives · 2026

24 alternatives to GNU Indent – CLI code formatting

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. GNU Indent – CLI code formatting launched in 2022; newer entries below may have overtaken it.

1. 1
   slop-grader▲89

   Jev-AI CLI tool that evaluates text against custom rulesets

   Sep 2026 · github.com · its alternatives →

2. 2
   Macaw▲90

   A simple code editor for Swift

   2017 · github.com · its alternatives →

3. 3CF
   Code Formatting API▲7

   2018 · neutron64.com · its alternatives →

4. 4
   GNU Emacs▲8

   An extensible, customizable, free/libre text editor and more

   2016 · gnu.org · its alternatives →

5. 5EG
   Enhanced GNU Awk▲6

   2022 · kylheku.com · its alternatives →

6. 6
   Openemacs – a tiny emacs clone, ≤ 1024 LOC (C), based on kilo (BSD)▲8

   2016 · github.com · its alternatives →

7. 7
   GNU Bash Manual (Pandoc Markdown)▲9

   2019 · github.com · its alternatives →

8. 8
   Onboard-CLI, a LLM powered and AST-based tool to visualize codebase▲24

   Onboard-CLI—a blazing-fast developer tool I built in Go. It uses AST parsing (Tree-sitter) to map out codebase architecture and automatically blocks spaghetti code and bad dependencies locally before you even commit. I heavily optimized the concurrency, so it can parse 50k+ files in under 10 seconds.

   Jul 2026 · github.com · its alternatives →

9. 9
   Lightweight format for small configuration files. (C)▲6

   2017 · github.com · its alternatives →

10. 10IW
    I wrote a scheme interpreter in C▲7

    2019 · rain-1.github.io · its alternatives →

11. 11
    Codemaxxing – Maximize your slop abilities▲5

    I built a CLI tool to generate as much slop as possible

    Mar 2026 · github.com · its alternatives →

12. 12GO
    GnuCOBOL on Windows – From Compilation to HelloWorld▲8

    2017 · blog.brakmic.com · its alternatives →

13. 13IA
    Inspecode: An automatic code review and code correction service▲6

    2017 · rocro.com · its alternatives →

14. 14
    I built a CLI that turns your codebase into clean LLM input▲10

    A simple CLI that transforms your code into clean, structured text for feeding into LLMs. - NoahCristino/llmcat

    Apr 2026 · github.com · its alternatives →

15. 15DA
    Diffboard, a pastebin alternative with diffs▲5

    2012 · diffboard.com · its alternatives →

16. 16
    Rim▲2

    a minimal library to build CLI programs in C

    2022 · github.com · its alternatives →

17. 17CI
    Cheatcode.io, a Swift syntax reference▲9

    2014 · cheatcode.io · its alternatives →

18. 18
    Intro to x86 Assembly Language [video]▲7

    2017 · youtube.com · its alternatives →

19. 19
    A Brainfuck to C transcompiler in Ruby▲7

    2015 · github.com · its alternatives →

20. 20NC
    Node-cli-proxy: web front end for interactive command-line programs▲8

    2014 · tmskfk.com · its alternatives →

21. 21AV
    A very simple Lisp interpreter in 250 lines of literate Python▲5

    2017 · khamidou.com · its alternatives →

22. 22
    A Semiring of Functions [pdf]▲9

    2016 · github.com · its alternatives →

23. 23AS
    A small symbolic math command line using algebrite and katex▲5

    2018 · bwasti.com · its alternatives →

24. 24
    Emacs Lisp▲4

    An Introduction

    2017 · amazon.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 →