“…one great choice for graphic organizers is Google Drawings. See below for directions on how to create graphic organizers with Google Drawings (including a help guide and a recorded webinar) as well as 30 free sample graphic organizers that you can copy, use, and modify as needed.”
Here’s a template archive of graphic organizers linked to Eric Curts’ Google Drive. You can easily download templates and put them to work. Kudos to Gary for providing this work under a Creative Commons license.