Brainstorms+&+Mindmaps

[|Bubble.us] - a great site for students to brainstorm. Students can work collaboratively as well.

[|Mindomo] - another online mindmapping tool.

[|Exploratree] - a great site with lots of different ways to mindmap and brainstorm. Definitely worth a look.

[|Mindmeister] - collaborative online brainstorming.

[|Online Brainstorming Tools] - an extensive list of ideas and resources.