Which is the best free mindmap software online?

[Life_Is_Short]

Apparently mindmaping is the best way of remembering information and so i was wondering if anyone knew the best (free) mindmaping software online. I want to try all the memorising methods and find one that works for me because i know work at university level requires a lot of recalling and linking information. Posters with large writing work but that's is a lot of work. :hmm:

Jazak'Allah Khair

 

[S<Chowdhury]

This is a free one I've used once i found it easy and simple mostly.

http://www.xmind.net/

Is a really good and though its not free, you only get to create three mind maps as a free member.

http://www.mindmeister.com/

And this is one i quickly skimmed through the reviews of it and it seems to look good as it is well-suited to people with fairly basic visual diagramming need.

http://freemind.sourceforge.net/wiki/index.php/Download