[ifree]

Checkout https://kinopio.club a flexible graph based browser tool which supports mindmap, bookmark, image, link, notes etc. Personally I like it a lot.

[knlam]

I also like kinopio and use it daily. However, I don’t think it is suitable to take note (even short one)

[ifree]

I agree with you although it has basic markdown support which can be used for short notes and TODOs, but note taking is not its essential feature.