Coggle. This mind map allows you to create a sharp, focused mind map and also share it with others. "Sharing" it with others doesn't just mean allowing them to see it. You can "share" with others to allow them to work on the mind map as well. This is a great way to work on collaboration because students are working together but have their own computer. They can work on the same Coggle project on two different computers. Once your project is done, you can download your coggle in PDF or PNG (image). You can also generate a link to your Coggle project. One thing that Coggle doesn't do that other mind maps do is allow the user to insert pictures. Be aware of that if you plan on using Coggle with your students (which I hope you do!)
Applications for Education: Create a Coggle about any topic, unit, question. The collaboration that Coggle offers is a great way for students to work together to produce something worthwhile and meaningful. Like anything with technology tools in our school district, there are hurdles with Coggle. In order to "share" with others, they need to have a Coggle account, which is free but requires an email address for sign-up. So until our students have that, which they will eventually, you may have to use the Coggle as a project done individually or pairs at the same computer.