PHObsidian
Obsidian is a free, flexible application for organizing private thoughts and knowledge.
It prioritizes user privacy by storing notes locally and offers extensive
customization through thousands of plugins and themes.
Key features include linking notes to create a personal knowledge base,
visualizing relationships with an interactive graph,
and an infinite canvas for brainstorming.
Optional services like Obsidian Sync provide secure, end-to-end encrypted access across devices,
while Obsidian Publish allows users to transform notes into online wikis.