Freeplane is such an amazing mind mapping program, as long as you have some patience for learning it. I had never heard of it until maybe a year ago when I downloaded it. It's FOSS!

There are so many ways you can relate ideas to each other and lay out details. Plus it lets you embed internal or external links, images, and probably other types of media; I haven't gotten around to exploring all the features yet. And it also supports add-ons made by the community to extend its already broad functionality.

I'm currently using it to plan my dream video game, and it has been a priceless source of continued inspiration. I have pretty bad ADHD, but using this software has helped me stay motivated and ambitious. I used to get overwhelmed and turned off while navigating my huge plaintext thought-vomit notes. I swear this isn't an ad, as much as it sounds like one 😂