TiddlyWiki

TiddlyWiki is a flexible, single-file personal notebook or knowledge management tool that runs in a web browser. It allows users to create, organize, and link notes, ideas, or tasks seamlessly without needing a server or complex setup. Everything is stored within one self-contained HTML file, making it easy to back up or share. It's customizable through plugins and themes, turning it into a powerful workspace for personal or professional use. TiddlyWiki is ideal for organizing information, tracking projects, or capturing insights in a structured, portable format.