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Looking for OneNote Alternative
(feddit.de)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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This was one of the main selling features for me (before I tried it and experienced all the other killer features). I've experienced a bad case of vendor-lock before where it was hell to export my data. So having it all available in plain text at all times is really reassuring.