I keep lots of notes as I work - code snippets, TODO lists, account details, links, comments. I currently use plain text files for this - very simple and robust but a bit last-century. I would like features similar to HTML - e.g. to embed pictures, formatting, and crucially hyperlinks within my notes. One particular use-case is an implementation of Getting Things Done - more or less, a collection of hierarchical TODO lists, which I'd implement with hyperlinks between tasks. Most WYSIWYG HTML editors seem to be aimed at web designers, creating beautiful pages for professional websites. Is there a simple tool / editor more appropriate for how I want to use it? (or advice from anyone doing the same)