XMind is a very powerful mindmap software for Windows/Linux/Mac.
I think it's better than FreeMind in terms of functions.
It has freeware/open source version, which is enough for most users.
Also, it has Plus (79 usd), Pro version(99 or 129 usd).
Now, XMind Plus 2012 is free for Edu/Nonprofit Org before May 31.
ID photo needed to upload, so they know that you are a student/teacher or work for a non-profit organization.
Get it: https://www.xmind.ne...uy/?t=edu&p=plus