Draggable index cards

I've tried using mind maps and Kanban board tools for brainstorming and organization, but they often become overwhelming. So far, I am very satisfied with the minimalist Card Buddy app, which is incredibly intuitive. I didn’t need to learn anything new to start using it. You can create an infinite canvas, drag around cards, drop in images, and customize the layout, style, and colors. It requires a one-time payment of $20 and is available exclusively on Mac and iOS. — CD