XMind is the most popular mind mapping tool. Millions of people use XMind to clarify thinking, manage complex information, run brainstorming and get work organized. It couldn't be easier to get started.
XMind is an open source project, which means it's free to download and free to use forever. XMind Plus ($79) and Pro ($129) with more professional features are also available.
ver: 8 Update 3 / Sep 02.2017
ver: 7.5 3.6 / Oct 05.2016