SpiderScribe.net is an online mind mapping and brainstorming tool. It lets you organize your ideas by connecting notes, files, calendar events, etc. in free-form maps.
License: Free Personal
SpiderScribe.net is ideal for users looking for a straightforward mind mapping tool with collaborative features, while ThinkComposer excels in providing advanced diagramming capabilities and system thinking tools, although it may have a steeper learning curve.