Interactive Graphic Organizer – Bubbl.us is a simple web-based mind-mapping application that lets you brainstorm, share your work online, embed it in your blog or website, email it, or save it as an image. The free version allows students and teachers to save up to three mind maps. It runs on both desktop and mobile devices.

Interactive Graphic Organizer – The Visual Understanding Environment (VUE) is Open Source downloadable mind mapping software based at Tufts University. The VUE project is focused on creating flexible tools for managing and integrating digital resources in support of teaching, learning and research. VUE provides a flexible visual environment for structuring, presenting, and sharing digital information.

These printable graphic organizers from Houghton Mifflin Harcourt will help children classify ideas and communicate more effectively. They include organizers to structure writing projects, to help in problem solving, decision making, studying, planning research and brainstorming. You have permission to print and copy these pages for classroom use.

Mindomo is a web-based mind mapping interactive graphic organizer with tools for both teacher and student use. For teachers, there are tips for classroom use. and an Assignment Guide. Making mind maps with Mindomo is easy and intuitive, and their are options to import XML, text files, and several other file formats. Students can share, collaborate, export, and print their maps.

Each student and teacher can creative three maps with free registration. Access to more storage, maps, and features is available for a fee.

TeAchnology offers dozens of free printable graphic organizers for lesson planning, KWL. story mapping, character analysis, vocabulary and Venn diagrams.  The PDF organizers listed on the page are free.  TeAchology offers other packages of organizers on their site for a paid premium membership.