Simple Diagrams is a site dedicated to creating...well, simple diagrams. Stick figures, word clouds, and arrows. For students who can easily be distracted this seems like a great option. It also puts the emphasis on the contact and not on all the bells and whistles a software can provide. It uses simple drag and drop features. It is a software that you download to your computer and not web based. There are more features that are available for a paid version of the software. More information on the Free Version and Paid Version (only $19) are available on the site.
Here is a screen-shot from their website of the Free Version. If you decide to pay for the software you will receive access to some other libraries of images that you can use. The Free version for us cash strapped educators seems to offer plenty for classroom use. Maybe an educational library will be available in the future.
I am looking forward to how I might be able to use this for professional development.