Luhmann's Zettelkasten for Notion
The best second brain system for knowledge workers
Luhmann's Zettelkasten for Notion launched on September 8, 2022 with 89 votes, #452 of 3,464 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
What it does
The Zettelkasten will nudge you into building the right habits for daily reviews, reading, and writing. This way you will continuously upgrade the quality of your notes, and write tons of content with ease.
Does a similar job
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An AI zettelkasten that extracts ideas from articles, videos, and PDFsDec 2025 · github.com · ▲38Hey HN! Over the weekend (leaning heavily on Opus 4.5) I wrote Jargon - an AI-managed zettelkasten that reads articles, papers, and YouTube videos, extracts the key ideas, and automatically links related concepts together. Demo video: https://youtu.be/W7ejMqZ6EUQ Repo: https://github.com/schoblaska/jargon You can paste an article, PDF link, or YouTube video to parse, or ask questions directly and it'll find its own content. Sources get summarized, broken into insight cards, and embedded for semantic search. Similar ideas automatically cluster together. Each…
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Source: Product Hunt launch ↗
Launched alongside, September 2022
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Life & fun · 2022 · dogbunnypuzzle.com
A couple of years ago, I had an interesting idea. What if there was a marketplace where all the underlying tech was open-source? The order management system, the storefront, customer support, etc. The marketplace would simply connect to the seller’s infra instead of locking them in. If, for some reason, the seller is removed from the marketplace, their software stays with them and they can continue accepting orders directly. This model can be used to disrupt any marketplace from AirBNB to UberEats: building tech for home renters and restaurants and later, leveraging that to build a competing…
Dev tools · 2022 · openship.org
