TiddlyWiki - a private Wiki for taking notes in a non-linear way. Works on any system (even offline!) and only requires a browser.

TiddlyWiki is a unique tool for note-taking that combines features of a wiki and a personal organizer. It operates in your browser, which means it requires no installation or complicated setup. This allows users to easily create their own pages and notes that can be edited and shared. TiddlyWiki is incredibly flexible, making it customizable for personal needs as well as team work. There are many plugins available that enhance the functionality of this tool, attracting a diverse range of users. Additionally, TiddlyWiki supports multiple formats, including text, images, and multimedia, which makes it suitable for those who enjoy a variety in organizing their information.