NCH Software's tools are famous for compact file size and high efficiency. ClickCharts is a tiny and handy app that can help you easily make simple and intuitive flow charts (including the creation of various diagrams or mind maps), so as to clearly show your thinking, planning to others.

Edraw Max (AKA: EdrawMax) is the professional edition of Edraw Mind Map, which is a vector-based mind map creating application with automatic layout, lightweight size but rich functions. And as a freeware, Edraw Mind Map can not only meet the needs of most common users, but also replace the commercial version of Microsoft Visio.