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Obsidian is now free for work - Obsidian
(obsidian.md)
This is a most excellent place for technology news and articles.
It's interesting that a closed-source app has good reputation among FOSS enthusiasts. Surely they are not a Microsoft or Apple, but still who controls your computer, you or them?
I've been really enjoying trilium as an open source alternative but fair warning it's not as polished as Obsidian