Online Mind Mapping for gathering Resources

Maria Andersen is blogging on Teaching College Math, a very interesting and incredibly useful blog for Math's teachers and learners. Sher recently wrote a post about games, play, and learning.  She linked to a library of resources in various formats.  She stored it as an online mind-map, as you can see the preview above, using Mindomo.
One other way I would recommend you for sharing online ressources as an interactive online mindmap  is Pearltrees.  Here's an example, this map is called "Mind and Brain".

Mind and Brain and consciousness in science / (dcoda)