Xmind is an open source brainstorming and mind mapping software tool developed by XMind Ltd. It helps people to capture ideas, organize to various charts, and share them for collaboration. Supporting mind maps, fishbone diagrams, tree diagrams, org-charts, logic charts, and even spreadsheets. Often used for knowledge management, meeting minutes, task management, and GTD.
For its upcoming 3.1 version, the website is going to be redesigned. And a bunch of icons are need to represent the features.