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For those that want to go beyond mind-mapping around a central node and want to just let flow ideas in any order, Big Hairy Goal for macOS may be another option to consider. It's intuitive and fast. A free trial is available and purchase options are either a subscription or a lifetime license.
Specs
Pros
Pro Do what you want to when you want to without getting in the way
having a great impact on my life in visually seeing my thoughts on a “canvas, organizing them, and getting things accomplished. It’s interface is minimal, which adds to the pleasure of using it. Add items, build relationships between them, add status levels on the items is so helpful. I’ve used to many different types of apps from big money ones, to online task oriented ones and this one has its power in its simplicity. Simplicity doesn’t mean “limited”, minimal doesn’t mean limited, it means, no excess, no overwhelm. Like getting into your car, it allows you to just get on with driving, compared to if we had to sit in a space shuttle-like cockpit for our car, I’m sure we’d be staring at the interface for too long when all we want to do is drive.
Pro Excellent tool for organising your thoughts
This tool helps me organise my thoughts; I use it to draw and maintain our company’s organisation chart; plan actions and strategy; and write presentations. Audiences love it for presentations as they can follow the overall flow and they know how far we are into the presentation.
The tool has improved a lot since I bought it, I find the new functionality even more helpful.
Support has been outstanding, I write directly to its creator and he answers immediately with guidance or even creates a new release within a week to incorporate my comments.
Pro Highly flexible workflow
Big Hairy Goal calls items used in the workflow “cards.” Cards can be connected to subtasks or contain notes and other details.
Cards can be arranged in columns to simulate a workflow by moving cards from left to right as they are completed, or as a way of indicating task priority.
Cards also can have states like read doing done that clearly places them in a flow of events.
The workflow is highly flexible as cards completely customisable to suit the task flow. This makes Big Hairy Goal a great solution to feature management as it's possible to set up a workspace to handle everything from agile sprints to flow charts, actions to do lists or any other visual status management.