Mind42 is a free browser-based collaborative mind mapping service. The tool has a very clean and intuitive user interface, and allows collaborators to add include images, change font attributes, and does not limit the number of maps or collaborators. It also uses Google groups to host a forum for networking, and has the ability to restore previous
Visual Thinking Evolution
Wise Mapping is the web mind mapping tool that leverages the power of Mind Maps using new technologies like vectorial languages (SVG and VML). No pluggin required.
Mindomo is a versatile Web-based mind mapping tool, delivering the capabilities of desktop mind mapping software in a Web browser - with no complex software to install or maintain. Create, edit mind maps, and share them with your colleagues or your friends.
I would use this tool, MindOMO, in my Spanish classroom because I would use it to have student link key grammar concepts or vocabulary words together. This would help them see how grammar concepts in Spanish are intermingled and therefore it would help them get a better grasp on the language.
I found it very easy to use and I currently have two mind maps stored there. I used it for a refined flowchart for this class. The free account allows a total of three mind maps and you can attach files, display images and do limited formatting of text.
Delicious, as the sort of "grandfather" of social bookmarking sites, is a great resource if you 1) have friends or people that you'd want to share bookmarks with...2) you don't mind a monochromatic theme...
I actually really like Delicious BUT sometimes, my eyes go crazy because of the plain old black and white theme...I think that makes it hard to find information. I also really like that the website streams the most recent and most popular bookmarked websites...
You create several maps within one map space, provides a chat where the user can invite others to collaborate on the map and through time line slider you can access older versions of the map. It can also be downloaded on ipads. The academic version is more complete than this free version.