I explored Inspiration Software which is a great tool that aids in creating diagrams, charts, graphs, etc. This would be very useful to build a concept map or a web chart. It features many different icons and pictures that can be incorporated into whatever you create. It will aid in students' understanding of concepts by provided an effective visual representation of information. It also allows them to build on their own thoughts and ideas if they use this software.
Here is an example of how a teacher created a concept map using Inspiration to show her students "6 traits of Writing".
There are several different tutorials on the various feature of inspiration software at http://www.learningelectric.com/inspiration7.htm.