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Ferrite vs Apostrophe: catalog facts
Ferrite	Apostrophe
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0-or-later licence.
Windows, Linux	Linux
Markdown writing with preview Also handles JSON, YAML and TOML	Focus mode for distraction-free writing Live rendered preview
Focused on a few file types rather than general programming Younger project than established editors	Linux only Edits single files rather than managing a notes library
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.