Obsidian is a note taking application which was, in part the inspiration for this PurpleTreeWiki website. More on the history of the ideas in PurpleTreeWiki are here. This is the youtube video that first got me into Obsidian, this is a youtube video I made, showing the minimum necessary to make a wiki, and (/aw/web/pt1wiki) is my first stab at using the ideas of Obsidian, combined with the minimalist (under 1000 lines of code) philosophy, to make a note taking and sharing website.