Scrapbox
https://gyazo.com/e2115f3c583fb18de9b1156f323ef8a8
Write and connect a web of your ideas easily and access itreliably. You can use it collect and compound your knowledge at scale.
It's for free for personal use, public and private.
Use Scrapbox for all these different things
Linked thinking and linked note taking
Exploratory writing
Journaling / diaries
Making a public Digital garden or private Second brain / Zettelkasten
personal growth
For live editing with a group, such as in a meeting or at an event
Team knowledge management
Building an Antilibrary
Learn more about Scrapbox
See the Scrapbox Help project
inteltank has created an excellent series of articles introducing Scrapbox (in Japanese, to be translated)