Alternatives

Products that do what I made an open-source Notion-style WYSYWIG editor does

1. 1NA
   Nightlight, an editor that runs inside Clojure projects▲195

   2016 · github.com

2. 2WO
   Wysihtml – Open-source rich text editor for web apps▲215

   2014 · github.com

3. 3OO
   OpenKnowledge – open source AI-first alternative to Obsidian/Notion▲381

   Hi HN, Nick here. We’re launching OpenKnowledge (https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS. We built this because we wanted a Notion-like experience for writing and sharing markdown files across our team. Obsidian is the best alternative we tried, but found it doesn’t have a true WYSWIG UI and it didn’t integrate well with Claude/Codex outside of community plugins. So we built OpenKnowledge. It takes…

   Jun 2026 · github.com

4. 4AA
   Algojammer – an experimental Python code editor inspired by Bret Victor▲309

   2018 · github.com

5. 5IM
   I made a simple PDF text editor▲327

   2020 · simpdf.com

6. 6
   Notion Beta▲294

   An expressive and collaborative document editor

   2015

7. 7JF
   JavaScript-first, open-source WYSIWYG DOCX editor▲130

   We needed a JS-first WYSIWYG DOCX editor and couldn't find a solid OSS option, most were either commercial or abandoned. As an experiment, we gave Claude Code the OOXML spec, a concrete editor architecture, and a Playwright-based test suite. The agent iterated in a (Ralph) loop over a few nights and produced a working editor from scratch. Core text editing works today. Tables and images are functional but still incomplete. MIT licensed.

   Feb 2026 · github.com

8. 8MW
   My "weekend" project, an ML dialect and compiler▲68

   2012 · texodus.github.com

9. 9
   Brackets 1.0▲190

   An open-source text editor for web designers by Adobe

   2014

10. 10RS
    Recently started working on an open source data grid editor in JS/HTML▲46

    2014 · github.com

11. 11WM
    Woofmark – Markdown, HTML, and WYSIWYG Editor▲28

    2015 · bevacqua.github.io

12. 12IM
    I made an open-source publishing platform (with minimal JavaScript)▲41

    2021 · zentrum.alles.cx

13. 13HE
    Hyper Editor – A back end independent visual composer for web▲74

    2019 · github.com

14. 14IM
    I made a Vim-like editor for building webpages▲14

    2020 · vivpage.com

15. 15
    Layoutit!▲84

    WYSIWG editor for Bootstrap!

    2014

16. 16MF
    My first open-source project release – RandomJson▲56

    2019 · github.com

17. 17ME
    My Experimental "Dev Blog" For A Pet Project▲61

    2012 · bvckup2.com

18. 18IM
    I made tailzilla – A online code editor for Tailwind CSS▲24

    2020 · tailzilla.app

19. 19WE
    WYSIWYG-editing Markdown with Hallo Editor▲33

    2012 · bergie.github.com

20. 20MJ
    My journey to create a Text Editor that allows you to build apps▲24

    2020 · zecoda.com

21. 21TL
    To learn Clojure I made a “Spotify Wrapped”-like website for Goodreads▲7

    2021 · readingyear.com

22. 22IA
    Impressi | a WYSIWYG editor for impress.js▲17

    2012 · impressi.me

23. 23OS
    Open-sourcing our large Clojure(Script) Re-frame/Hasura web app▲21

    2020 · github.com

24. 24IM
    I Made a Web API for Textual Data▲27

    2013 · skr.io

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