Searchcube is a graphical search engine that presents search results in a compact, visual format in three dimensions.
A very interesting visual search, could be good to expand student thinking or for use with younger students
A great site for teachers explaining David Hyerle's Thinking Maps (8 only); has great video clip too!Thinking tools are graphic organisers that enable students to engage in independent thinking and learning.
Exploratree is a great site for educators to use for creating mind maps or brainstorming. This is an easy site to use that allows for group collaboration and comments as well. Best of all, Exploratree has a number of different templates to choose from to find the right "mind map" for you.