Ask HN: How did you build up your personal knowledge base? | Hacker News
https://news.ycombinator.com/item?id=21332957
DEVONthink — Smart document management for Mac - DEVONtechnologies
https://www.devontechnologies.com/products/devonthink/overview.html
Introducing Golden: Mapping human knowledge
https://golden.com/blog/introducing-golden/
JeffreyBenjaminBrown/digraphs-with-text
https://github.com/JeffreyBenjaminBrown/digraphs-with-text/blob/master/Hash/the-hash-language.md
POLAR - Easily manage your reading. Tag, annotate, and highlight PDFs and web content. | POLAR - Easily manage your PDFs, web content, and notes.
https://getpolarized.io/
Pocket
https://getpocket.com/
Power up your browser with History Search
https://historysearch.com/
Practice typing by retyping ENTIRE classic novels | TypeLit.io
https://www.typelit.io/
Save the web, freely | wallabag: a self hostable application for saving web pages
https://www.wallabag.org/en
SuperMemo Guru - supermemo.guru
https://supermemo.guru/wiki/SuperMemo_Guru
TiddlyWiki — a non-linear personal web notebook
https://tiddlywiki.com/
Zettelkasten knowledge and info management • Zettelkasten Method
https://zettelkasten.de/
Zotero | Your personal research assistant
https://www.zotero.org/
Quiver - take better notes on the Mac App Store
https://apps.apple.com/us/app/quiver-take-better-notes/id866773894?mt=12