Brainstorming in Web 2.0

I always like new tools that are good for teachers to use and students as well.  https://bubbl.us/ is a new favorite online tool. It's similar to kidspiration, without images.  Great for planning a lesson or a unit for teachers, and easy to use for students to plan a web both linear and nonlinear.  The colors are enticing, you don't need an account to use it, and did I mention it's free???  There is a link to a youtube video on how to use it at https://rrisd-teacherguides.wikispaces.com/Web+2.0