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Calmly Writer alternatives · Writing

Open-source alternatives to Calmly Writer

Calmly Writer is not described as open source on its own site. 26 of the 136 other writing tools in this directory are open source, according to their own sites.

Calmly Writer has a free plan. Paid plans start at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux. 25 of them are free or have a free plan.

26 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to Calmly Writer

  1. FocusWriter

    Free distraction-free word processor for Windows and Linux

    • FocusWriter is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists macOS and Android apps.
    • FocusWriter is open source, according to its own site.
    FocusWriter vs Calmly WriterFocusWriter pricing and details

  2. ghostwriter

    Free, open-source Markdown editor from KDE for focused writing

    • ghostwriter is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists macOS and Android apps.
    • ghostwriter is open source, according to its own site.
    ghostwriter vs Calmly Writerghostwriter pricing and details

  3. ZenPen

    Minimal browser text editor that stays out of the way

    • ZenPen is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists macOS, Windows, Linux and Android apps.
    • ZenPen is open source, according to its own site.
    • Calmly Writer can be bought with a one-time purchase.
    ZenPen vs Calmly WriterZenPen pricing and details

  4. Zettlr

    Free, open-source Markdown editor for academic writing

    • Zettlr is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • Zettlr is open source, according to its own site.
    Zettlr pricing and details

  5. bibisco

    Novel planning and writing software built around characters

    • bibisco starts at $3.49 per month for Everywhere sync; desktop Supporters Edition is $69 one-time. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only bibisco lists an iOS app.
    • Only Calmly Writer lists a web app.
    • bibisco is open source, according to its own site.
    bibisco pricing and details

  6. MarkText

    Free, open-source Markdown editor with in-place live rendering

    • MarkText is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • MarkText is open source, according to its own site.
    MarkText pricing and details

  7. Manuskript

    Free, open-source novel planner with an outliner and index cards

    • Manuskript is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • Manuskript is open source, according to its own site.
    Manuskript pricing and details

  8. novelWriter

    Free, open-source plain-text editor for writing novels

    • novelWriter is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists macOS and Android apps.
    • novelWriter is open source, according to its own site.
    novelWriter pricing and details

  9. Beat

    Free, open-source Fountain screenwriting app for Mac and iOS

    • Beat starts at $11.99 one-time for the iOS app. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Beat lists an iOS app.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists Windows, Linux and Android apps.
    Beat pricing and details

  10. Sigil

    Free open-source EPUB ebook editor for Windows, Mac and Linux

    • Sigil is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • Sigil is open source, according to its own site.
    Sigil pricing and details

  11. Texmaker

    Free LaTeX editor for Windows, macOS and Linux

    • Texmaker is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • Texmaker is open source, according to its own site.
    Texmaker pricing and details

  12. TeXstudio

    Open-source LaTeX editor with an integrated PDF viewer

    • TeXstudio is free. Calmly Writer starts at $16.99 one-time (Android); $23.90 one-time for Windows, Mac and Linux.
    • Only Calmly Writer lists a web app.
    • Only Calmly Writer lists an Android app.
    • TeXstudio is open source, according to its own site.
    TeXstudio pricing and details

14 more that are open source

All 26 in one table

Common questions

Is there an open-source alternative to Calmly Writer?

Yes. FocusWriter, ghostwriter, ZenPen, Zettlr, bibisco, MarkText, Manuskript, novelWriter and 18 more are open source, according to their own sites.

Is Calmly Writer open source?

Calmly Writer is not described as open source on its own site. The listing was checked on Oct 9, 2026 against the pages it cites.

Which of these writing tools are free?

FocusWriter, ghostwriter, ZenPen, Zettlr, bibisco, MarkText, Manuskript, novelWriter and 17 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Calmly Writer: the alternatives its listing names first, then the tools that share the most features with it.