Obsidian is a powerful and extensible knowledge base that works on top of your local folder of plain text files
License: EULA
Web page: https://obsidian.md
Translate: https://github.com/obsidianmd/obsidian-translations
Download: x86_64: https://github.com/obsidianmd/obsidian-releases/releases/download/v1.7.7/Obsidian-1.7.7.AppImage
arm64: https://github.com/obsidianmd/obsidian-releases/releases/download/v1.7.7/Obsidian-1.7.7-arm64.AppImage