Mindmapper aims to allow people to create Mindmaps, Diagrams or pretty much just Brainstorm without BS.
What kind of BS to be specific? Well you don't have to make a profile, nor will your experience be intruded by ads or paywalls, that's pretty much the reason why I made this. As a bonus, it works completely offline on your desktop.
It's still a heavy WIP at the moment, but I hope that it's functionality can be expanded on in the future.