Looking for a flexible way to organize notes, ideas, research, and projects? Obsidian is a personal knowledge-management app that stores notes locally as plain-text Markdown files, helping you keep control of your information—even when working offline. You can link related notes, visualize connections with Graph view, brainstorm on Canvas, and customize your workspace with plugins and themes. It could be useful for sermon research, conference planning, ministry projects, reading notes, or building a personal library of ideas. Explore Obsidian at https://obsidian.md/. (Thanks Justin).