Spider Scribe is an online mind map creation service. Spider Scribe can be used individually or be used collaboratively. I've reviewed a lot of mind mapping tools over the years. What jumps out about Spider Scribe is that users can add images, maps, calendars, text notes, and uploaded text files to their mind maps. Users can connect the elements on their mind maps or let them each stand on their own.
Applications for Education
For visual learners Spider Scribe could be a great way to organize information. Students can upload pictures about a subject then organize them into a sequence or pattern that explains a concept or event.