Dendra is a mind map maker that opens straight in your browser, nothing to install. Build fast with the keyboard (Tab adds a child, Enter a sibling), give bubbles colours, icons, notes, due dates and sticky notes, then switch between 11 layouts (mind map, tree, org chart, timeline, fishbone, outline…) and 16 themes. Export to PDF, PNG, SVG, JSON or an Obsidian canvas. Same maps on computer, iPhone and iPad. Free, in 11 languages.