There is a wonderful piece of software, totally Open Source, in which you can make a professional looking mind map quickly, easily, and conveniently.
Freemind is this specific piece of software, and not just that but you can export these mindmaps directly has images and also you also as Web pages. Written in Java, it describes itself as the premier free mind-mapping software.
The software is just over 10 MB, but works wonders and there is many different options and styles. For your copy, see the Freemind Wiki here for the download page and also for further information. It is cross-platform.
The Freemind Wiki can be located at this link.
It also claims to be faster than Mind Manager. I hope you enjoy this Open Source software. Have you used this software? Have you used Mind Manager and are looking for a better alternative? What do you think of this software, and do you regularly use mind mapping software? If so, leave a comment.