SimpleMind is the world leader in cross platform Mind Mapping tools.

Analyze & learn
Analyze your thoughts and structure them with SimpleMind. The unique free lay-out allows you to organize your ideas exactly how you want it.
Multiple Mind Maps on one page. Horizontal, Vertical, Top-down and List Auto layout, perfect for brainstorming. Virtually unlimited page size and number of elements.

Add media
A picture is worth a thousand words, add images to your Mind Map!
Add images or photos. Add video recordings to topics (available on tablets and phones). Add voice memos (available on tablets and phones).

https://simplemind.eu/