Visual Brainstorm is a great tool for brainstorming!
Visual Brainstorm is software that helps automate the process of mind mapping or brainstorming. The Mind Map may seem abstract, but once you follow through with the process, you develop a fuller understanding of your thoughts. Visual Brainstorm is brainstorming software that facilitates this process by allowing you to focus on writing as the software takes care of graphical tasks such as connecting lines for you.
Brainstorm trees can be as massive as you need them to be. They also don't have to be connected, so you can create parentless nodes on the fly. Each tree can be saved in a tree file and quickly recalled in the future. Visual Brainstorm runs natively on your system.
Visual Brainstorm comes with a data sequencer, this allows you to capture target data and inject it into a node.